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I can't go the desktop route as I travel about too much. Purely for gaming I would get the Asus G73Jw notebook its 17" and the new Sandybridge model (when it comes out) is even better specced.
http://uk.asus.com/product.aspx?P_ID=WzU7IKA6SWdBvaRd
But it weighs twice what a 17" Macbook Pro weighs. I carried one before and it really falls into the luggable but not portable category. If I was rich enough to buy a laptop just for games it would be that one.

This is my first Mac (2008 Unibody Macbook Pro) as I liked the balance of battery, speed, screen, weight/size. I started with a mix of Windows/ OSX use, then slowly migrated to OSX for everything but games. I will replace it with one from the new refresh. Hopefully the rumours of AMD GPUs are true .
 
The outcome is based on how hardcore you are going to go with your gaming. If yes, then I, too, would get a dedicated PC rig. The Macbooks do get hot, and can actually get a bit uncomfortable in your lap.

If no, then the Macbook (higher end) should do you fine. I will add another vote to the general favor of Win7 (although I usually use Debian as my operating system of choice). Bootcamping into Win7 on the Macbook should present you with enough options to go about your general gaming with comfort.
 
NO, NO, NO.

I have both a new Win7 Pro core i7, laptop and a new 15" MacBook Pro core i7, both have 8GB ram and SSD's. Having the same processor, they are as close to identical as possible. So again, the answer to your question is NO do NOT buy the Mac, it runs really hot, the thin Unibody construction, lack of proper vents and temperature controls competely takes the fun out of using it for games. Also forget boot camp, or virtualization, like VMware, or Parallels. Tried those, they are an epic fail when it comes to what you want to do.

Plus you're going to pay about $1,000 more for it as compared to a good ThinkPad or one of the new Professional HP's. Either of those are outstanding. I just got the HP.

I have a Mac because I've been using them for years, but you cant' even run YouTube without it getting hot after a period of time. It's well documented that overheating, is a Mac Issue. They put styling and a thin profile as a much higher priority than having a fast, cool running laptop. The difference is staggering. Save yourself the headaches. Get the PC, run your games and enjoy. Windows 7 is outstanding.

Can you go troll elsewhere? Your whole entire paragraph is false.

OP, don't listen to this guy, he's clearly clueless. As someone who works in IT I can easily tell you too that anything HP makes as of late is complete trash.

Ok, first, this guy states "The Macbook Pro runs really hot!" No, this is dumb speak. Just because the case feels warmer (aluminum body) doesn't mean the CPU is running hot. The whole case acts as a heat sink and is much more efficient then plastic bodies. As for "Lack of proper vents", again, false. The entire back is a vent and you have more vent space then most PCs.

This guy also confuses bootcamp with virtualization. Completely different things. Bootcamp is just like running windows natively and games run just like they do on a native windows system. Trust me, I develop games in windows on my mac for my degree.
 
1. Firstly, I want to tell the guys who say Vista is bad, that they are subjective.

I'm sorry this isn't even opinion anymore. Try supporting 15,000 users who have Vista. You will change your tune immediately. Vista is complete garbage and even Microsoft admitted it. For people who don't do much on their computer, Vista may work, but for heavy users Vista is unusable even after all these years. Pre-service pack 1 was especially bad whenever users could not copy even 200GB of data from one hard drive to another on a Vista machine.

http://www.maximumpc.com/article/features/shattered_dreams_and_broken_promises_vistas_failure_launch
 
Isn't it a back and forth which company has the best graphics AMD or Invidia?

On the desktop front very much so.

For notebooks AMD has led for the last 2-3 years in making chips with much higher performance for the sort of low TDP a MBP can deal with. MBP are currently able to deal with 24watts TDP for the GPU. So the max we could get with nVidia is:

NVidia 525m 23-25w TDP - 3DMark_06 =7000ish

where as with AMD:

The new AMD 6570m is 25w TDP (probably) - 3DMark_06 = 8862
The new AMD 6750m is 25w TDP (probably) - 3DMark_06 = unknown but faster than the 6570
The new AMD 6830m is 25w TDP (probably) - 3DMark_06 = unknown but processing power is DOUBLE the 6570m (maybe 10,000 3d marks)



In short ATI_6570m would beat a nVidia_525m, an ATI_6750m would destroy it and an ATI_6830m would actually make the MBP a gaming machine.



ps
I know there not going to use the 6830m, but I like to dream. (There is no reason but cost not to use it though).
 
I would probably tell you not to simply because it will be difficult to have those games perform well on a Macbook with DirectX 11. DirectX 11 uses too much graphics and processing power that a Macbook just can't provide all that well. In other words, the upgrade to DirectX 11 isn't worth it because it won't be able to utilize DirectX 11 well.
 
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