I originally had a BlackBook. Then I purchased a MacBook Pro v 2,2. Then I purchased a MacBook Air rev A to use secondary with MBP.
Then I sold them all and bought a unibody MB.
Then I bought a MacBook Air rev B with 1.86 CPU and SSD.
And I added back a MBP v 2,2 primarily for my kids use.
I essentially went from Unibody MacBook to Rev B MacBook Air.
When I first received my unibody MacBook, I was very happy with it. I really wanted it to be a rev B MacBook Air, but I didn't believe Apple had really fixed everything wrong with the original MBA. Remember the Unibody MB was released the day after announced on October 14, 2008. I bought the Unibody MacBook the day after announced. Although the rev B MacBook Air was announced the same day, it didn't start shipping until November 2008.
I was extremely impressed with the build quality and the unibody design of the MacBook. Going from the 2.33 GHz MBP, I saw more speed from the 2.4 GHz MB. I did upgrade the MB to 7200rpm HDD and 4GB RAM. The MB was very snappy, definitely quicker than my MBP. I used the MacBook as my work computer and personal computer. In fact, I got rid of five computers and used only the unibody MB for a little over two months.
I am a management consultant and do some lecturing. On the side, I do some Internet stuff. I used the MB from everything like Word, Pages, iLife, Excel, to more intensive Photoshop, Dreamweaver, and etc. It did everything really well and quick. I could not have been more impressed by the speed and capabilities of the unibody MB.
However, the display is not very nice at all. And I spend upwards of eight hours per day in front of my computer. In addition, I watch movies on my computer and do some personal video editing and review personal photos. The display is very washed out on the MB. Viewing it from any angle other than dead on results in extremely washed out or faded look. Also, dark colors are more of a purple hue or darkish gray with purple hue. There is no black on a unibody MB display. I looked at several of them.
November came and I started reading some excellent reviews about the new rev B MacBook Air. I work with some college professors on various consulting projects, and five of them got the rev B MBA the first week it started shipping. All of them had previously had original MBAs and were not very happy with the performance... and that is stating it mildly. All that received the rev B MBA were completely happy... no really excited and amazed! After reading some excellent posts about the rev B MBA, and hearing all of the new owners bragging about them, I decided to ask a few if I could test theirs.
I spent some time and was instantly amazed. I could not believe the performance differences, and neither could any of the owners! I could not believe the heat differences and video playback and it just went on and on with great news. Then I started reading about the lines, and I was pretty happy with the unibody MB I had. But I started looking at the rev B MBAs my friends and colleagues had and there were no lines. Then I asked some more, and no lines. Then in January 2009, I bought my rev B MacBook Air.
I loved my rev B MacBook Air. It was absolutely amazing for me. I could NOT believe how much the SATA drive controllers made the SSD super incredibly fast. More than making up for the slower clock speed. And I noticed heat was like non existent. The fans were incredibly quiet. The Penryn 17W CPU changed all of the problems on the original MBA which had a 20W overheated Merom CPU. In addition, I believe the 6 MB L2 Cache on the new MBA's CPU also helped with speed (an improvement over the original MBA's Merom with 4 MB L2 cache). The graphics seemed really amazing too. Photoshop flew through large files. Booting the rev B MBA with SSD is like a 25 second process. Opening large files or apps is instant. It was incredible that as bad as my original MBA performed, my rev B MBA was incredibly great at every level.
Here is the best part, while looking at the display for eight hours per day, the rev B MBA has an incredibly beautiful display. Blacks that were like a black hole... deep black. And viewing it from the side wasn't terrible like the unibody MB display.
A month after buying the rev B MBA I bought the 24" LED Backlit Apple Cinema Display. The picture was absolutely stunning. The usability with the rev B MBA was awesome. It is like the perfect docking station. It has power from the MBA, and built in USB hub, and speakers and webcam all in one. The new ACD is an absolute must for rev B MBA owners as well as unibody MB or MBP owners. Also, the rev B MBA's Nvidia GPU is so powerful it can drive a 30" Apple Cinema Display if you want to!
I cannot speak more highly of any Mac than of the rev B MacBook Air with 1.86 GHz CPU and more importantly SSD. I definitely recommend you buy the ACD whenever you can.
If you primarily want to work at a desk, with the 24" LED Backlit ACD, you could get away with the unibody MB. But, you would not want to just look at the display on the unibody MB daily. It is just too inferior and so poor quality. It would be ok for on the go to check something here or there, but don't expect to like it for everyday use.
So, MacBook Air gets you an incredibly portable computer yet with SSD very quick too. At the same time, the display is beautiful and the overall feel is wonderful. The HDD is not nearly as fast for normal things one waits on like boot up and app opening and etc, but if it's running all the time, the difference isn't as great. The MacBook gets you essentially the same computer, except slightly inferior CPU (due to L2 Cache), and terribly inferior display. At the same time, it has optical drive, and it is beautifully built as the unibody frame is very solid and feels amazing.
I would say if you cannot afford the extra for a rev B with SSD, and you plan to work with a 24" ACD most of the time, go with the unibody MB. Otherwise, find a way to buy the rev B MBA.
Either the rev B MacBook Air or the unibody MacBook are really nice computers. It is ashamed the MB doesn't have a nicer display, as then we could all make a great case for the unibody MB.
The problem, there is a lot of speculation of a soon to be released rev C MBA. Most are speculating the new Intel SL9600 2.13 GHz CPU, 4 GB RAM, 256 GB SSD, possibly new battery tech as used in 17" UMBP, and lastly the glass trackpad. These are all pretty good upgrades IF, and that is a big if, it is released sooner and not later. Other news is the unibody MB and MBP will receive speed bump upgrades before WWDC. May also get the new battery tech. The new Mac notebooks are over five months old. We normally see updates at six months (over last three years has averaged speed bump every six months). Not to throw a wrench into your plans! I am having a tough time myself after losing my Macs to theft as to what to replace now and what I should wait on.
Good luck whichever route you go.