I'm in the market for a new video card because I just bought a 4550 Dell 2.4 GHz computer with their 1800FP 18.1" LCD.  I currently have a 21" CRT and I'd like to chuck the card it comes with and buy one with dual monitor support.  I'm a moderate gamer so I'd like some decent 3D ability.  Any thoughts would be great ... ATI?  GeForce?

Both ATI and Nvidia make good display cards with dual monitor support. But currently I'm in favor of ATI's Radeon 9xxx series which are superior than those GF4s.