This is yet another 11" vs 13" thread, but with a more specific question. I recently bought the 11" ultimate, and I am quite happy with it. I'm still within the return period and although the form factor is fantastic I'm very interesting in insuring my investment is good for the long haul. What I use it for is web and moderate gaming. (World of Warcraft and Starcraft 2) I got to reading a bit and I'm curious about the performance boost with going from 1.6 ghz to 1.8 ghz with the double L2 cache size and faster front side bus. My question is how much of a boost is that really? I realize the sheer speed difference is minor, but what about the L2 cache and FSB?