Hi guys, There is a promotion on at a local store this weekend t celebrate the release of Leopard and they have the white 24 inch iMacs with the standard 7300GT gpu for about 1300 bucks. They also have the 20 inch for 950 and a fully loaded 2.33 ghz macbook pro for 1200. I like to play games and so the white iMac is really tempting for me if I can upgrade to the 7600 GT at a later date. Does anyone know if this is possible? I did a google search and found some posts where someone was claiming that they had spoken with apple who said that it could be done but I can't find anything confirming how to do it and/or the pricing. If it's not possible I will probably go for the macbook pro because it has 2 gig of ram standard and has the faster processor. Is there any difference between the performance of the x1600 gpu's in the mbp and the 20 inch iMac? I hope that you can help me answer these questions because it will make my decision a lot easier. Cheers!