Depends if he's sticking with XP or Vista.
I have 3 monitors but have to currently go with 2, since I found out that my soon-to-have 8800 and drivers won't play nice with a cheap DX9 card for the 3rd monitor. Apparently there are problems with the drivers and having a DX9 and DX10 setup. So has anyone been successful in pairing up a DX9 and DX10 card to run 3 monitors???
If sticking with XP, then get any decent vid card with 2 DVI ports. Then just get a cheap NV 5500 to put in the PCI slot to run the 3rd monitor.
Like many other people, I had hoped to use 3 monitors for gaming and other apps, but it looks like we're screwed, especially if we want to go with the horsepower provided by the 8800 series. I've not heard much at all definitively about the TripleHead2Go.......I wish SOMEONE that's used it or seen it could comment. It sounds good, but I've heard of problems.
More people are considering 3 monitor setups........there must be some reasonable solution out there..............