Okay, I give up . . . thought I knew what I was doing and am now thoroughly confused. My teenager can get a new 13" MBP with an i5 processor or - for about the same money (or slightly less) - get a C2D with upgraded RAM and HD. And I've just realized I don't understand the difference. He's not into gaming, so he'd be using the machine for more mundane stuff: word processing, downloading movies and videos, chatting and IM'ing, surfing the internet, lightweight photo and video editing, plus some web design and programming (probably using Windows). Probably all at the same time. Clearly, anything (even a dinosaur with an abacus!) would be a step up from his old ibook . . . it just doesn't have nearly enough RAM to keep up with him. But going forward, which is going to help him more, the new 2011 processor or the 2010 processor with double the RAM (and maybe a larger/faster HD, as well)? And, no, his budget doesn't allow for both - and I'm sensing that would be overkill, anyway. I'm sure this question has been asked and answered before . . . so if you just want to point me in the right direction, that would be great! Thanks!!!