Hey Guys. So basically i'm torn. I just sold my older Macbook Pro (15', 2.33 Ghz Core2Duo, 256Mb ATI X1600), which I am kind if regretting now lol, though my girlfriend purchased a new 13' pro the same day Anyways, I sold it because it rarely leaves the house, and it was really uncomfortable to do serious work on, so I wanted a desktop (got $1100 for it by the way, is that a good price or not?) I get paid on Friday, and will have ~1500 dollars. I've was originally looking at this system: http://store.apple.com/ca/product/FB325LL/A?mco=MjE0NjA3MA (24 Inch, 2.8GHz, 2GB DDR2, 320Gb HD, 256MB ATI 2600HD) First question, how much of a performance boost would that give me compared to the Macbook Pro I had? Then I started looking on craigslist, and not too far from the area i'm in, it is not super uncommon to see the newer 2.93 Ghz model, with the nVidia GT120 card in it, for around the same price. How much different are these two systems going to be? If I put the ram in the 2.8 system to the 4GB maximum, it seems that the systems would be nearly even, besides the video card of course, how much better is the GT120 going to be? Sorry if these questions have been answered before, couldn't find another thread, but thank you for the help in advance! Also, is the difference between the 20, and 24 inch systems that great? Because the 20 inch iMacs are a lot more common on craigslist. Thanks again!