Just bought a TrippleHead2Go from eBay so now I can plug in all 4 of my 21 inch monitors!

I guess three monitors is best for racing though else you have a join in the middle of you view?

Ok, I've finshed boasting now

I'm pretty sure you would be better off using 3 monitors instead of 4. That way you can have a pure center view, and a left and right view with no line interuptions. Also, I'm pretty sure you would need a GPU that supports 4 moniters displaying different things.
~Bryan~

Lol, put them around you in different views. Left, right, back and front. Thats gonna own man, have fun!

Got three 22 inchers myself, although I can't use those beastly CRTs with the low resolutions (triple 800x600 on an ATI card) and fresh rates (60 or 75Hz, urgh, 100Hz please) the TripleHead2Go offers.

Otherwise I'd be joining in your fun.