08-25-2011, 12:32 PM
I went through a similar thought process.
I bought a mid 2010 13" MBP this January 2011.
My almost 6 year old iBook G4 just wasn't cutting anymore.
Of course shortly after my purchase, Sandy Bridge comes out. I'm not the best consumer apparently.
So I saved up a bit of $ and put in a 256GB SSD from Crucial and upped the RAM
to 8GB. Speed and battery life has improved. I've been getting crashes (not related to the RAM or SSD - a Flash thing I think) so the reboot time is only like 16 seconds. I occasionally use my optical drive.
If I were you, I'd get the MBA with the larger 256GB SSD.
I know it's pricey. I ended up putting an extra 600 euros into mine.