I updated my old trusty XP desk machine from 512K to 2GB ram and added a Gforce AGP card. Thought about replacing the box but the fans noise is silent & rarely kicks into high gear vs newer boxes with 600W power supplies with hot processor & video.

Now am thinking of replacing the big 22" IBM CRT at 160W with two smaller LCD's at 45W each.

Question is 20" square or 22" widescreen or 24" widescreen? Any tips on which works better space or price is not an issue. Video card is 256MB VGA + DVI connectors and goes up to 1920x1080 resolution @ 85hz so should not see any flickering. 

Any caveats to watch out for?