I'll go with the 4670. It seems a good balance of tech, performance, heat, and price. 4650 though is great if you don't really do much gaming, but might now and then (or like me need it for light CAD).
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Reply to EXT64
Being an Nvidia fan, I would go with a 220GT. Its a descent card, and being a low power 40nm gpu, it consumes next to no power, which means it can run on a system that has an old weak PSU, also produces very little heat, which means it does well in cases that are not well ventilated (mainstream dell, HP...). If u are an ati fan u might go for the 4650, I hear they are both close in performance.
Message edited by Hopar on 11-11-2009 at 08:54:19 PM