Ok, so I have a 2006 CD MacBook and I'm itching for an upgrade. My choices... ***Buy an aluminum C2D MacBook and I should be able to upgrade to Mountain Lion. I'd like to own one of these one day since they are rare. Problem is finding a used one online in my price range. I don't want to spend more than $600 on it. They've popped up but I didn't have the time to mess with it. ***Buy a C2D Black MacBook (I can handle a white, but I like the black). I won't be able to upgrade to Mountain Lion, but I can do Lion for now and be able to actually use iCloud with my iPhone. When I purchase it, I want to hang on to my old MacBook for a week or so to make sure it's actually stable and such. I do plan on selling my old one. I had it listed for $350 and got a lot of offers. I wouldn't mind spending just a bit right now for the Black MacBook but when ML launches I'd have to upgrade again. I think I can wait that out. It kills me not to be able to sync iCal, Address Book, and iWork stuff with my iPhone. Also, I recently owned a C2D iMac for about a week. I loved the performance compared to my CD MB. I know I may not get the same, but it was still a pretty big boost.