I got my iiyama 17" tft about 3 years ago for £350--18msec response time and I use it at 1280/1024 for gaming with no probs. I'm so happy with it that I didn't bother replacing it when I built my new PC recently.
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I got it 'cos PCZone mag recommended it at the time.
atm they are recommending the
viewsonic vp171s