13' i5 256SSD.
Should include the SSD, I think that would have more vs. i7.
Hm, mine is as smooth as it gets. I can't imagine simple scrolling to be clunky.It's been a good 3 hours since I first booted up the machine, and some have mentioned something about indexing that might happening at the beginning that causes the machine to get busy. But even after 3 hours scrolling of some windows seem a bit clunky and not very smooth.
Maybe I'm just being picky... Other than the lack of perfect smoothness in animations it's great.
I am not convinced that there are serious heat issues with the i7, but I like a quiet machine and don't want to be wondering every time the fans spin up whether the i5 might have been quieter.