Hi guys! I'm running a 2007 2.2 santa rosa macbook. I upgraded to 4gbs of ram and installed an SSD. My trusty whitebook handles most of what I throw at it. But, I can tell that she's getting tired... the fans run a lot. I run in clamshell and push to a 28" 16:10 monitor and use lots of external drives for media. Part of me wants to hang on to her as long as I can. But lately, I've been eyeing the new imacs. They're pretty sweet aren't they? My question to you, when do you upgrade your mac?