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From the monitors ive seen the 20" have better IQ and games look sharper but the 22" are nice for sitting back and whatching a movie on.
As for the GFX card, it's harder to say whitch is better as know one knows. just flip a coin for the x2900HD - 8800GTS or buy the fastest you can.
Will i need a 640 mb to run a Samsung 226bw ?
I got a 320 on xp and if you are getting 8800gts i would get the 640 now.
Right, you say you want to be able to play the upcoming titles. For this the X1950 isn't going to cut it at 1680x1050.
For a better chance of running new titles then go with the 8800GTS 320Mb at 1280x1024 and the 8800GTS or X2900XT at 1680x1050. The cards are not needed to run a lot of titles at 1680x1050 but the chances of newer, better looking games running at high resolutions is very slim on older cards (X1950/7950).
no dx10 without vista right?