Ok the 5200 can be made to support some widescreen resolutions but one has to fiddle with custom resolutions and it may not work with dvi. If he wants to try to play around with his present card to see if he can get it to work first I'll try to help him where I can. If money isn't a pressing issue I would go ahead and replace it with the 8400gs listed below.
I recommend pci rather than agp so that he can reuse it in a later machine. If he buys agp it will have to be scrapped if he replaces the machine since agp is dead.
This has about the same power draw as the 5200 card so should be a pretty safe replacement.
Chances are if he did any upgrade, that card would also go, rather than applied to a new system. He is looking for a filler and I have run his setup in the past, so my reccommendation is based on an actual system configuration. It's extremely unlikely that any filler card for this setup will be kept for an upgraded system.
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