I was also considering going down the SSD and MBP (when they are updated later next year) road but the more I looked at it the more the expense to do this did not make sense.
Also, there is speculation made by a couple of review sites suggesting Apple has deployed optimised firmware for the Air SSD giving it superior integration with the OS, making it significantly faster than a MBP with a DIY SSD installed.
The higher 1440x900 resolution is also beautiful and not available on the 13" MBP.
I also believe many people severely overestimate their computational requirements. When you are looking at a 1.82 Ghz C2D processor and 2GB+ of RAM with a 1066 Mhz frontside bus I would guess for the majority of people the harddrive read/write speed will be the real bottle-neck in day-to-day work rather than processor speed.
I agree that the extra resolution on the MBA is great, and useful if you don't use spaces primarily. I do, so I don't work with multiple windows side by side. Plus, you get a slight trade-off with lower screen quality as far as color, etc (though it isn't glossy, which can be a plus).
I doubt that the reviewers are correct in that statement, as the MBA's SSD is a Toshiba made SSD that is based on older technology, and is significantly slower than a Sandforce based drive currently is. That isn't to say that the read/write speeds aren't significantly above what a HDD has; it just isn't up to speed with, say, something from OWC.
But I 100% agree that the bottleneck is the HDD. Processing speed can be very nice, though, especially when working with some programs.
