As for 2 cards not cutting it, i personally dislike dual card solutions, so i might be biased. For using 3 cards...it would probably difficult to divide the rendering between the 3 cards because you cant divide 100 by 3 evenly. Personally, i feel the future lies with dual GPU cards
Syn7ax 3rror, since you are obviosuly dissatisfied with your 7800 GTXs, let me take them off your hands for you. Ill even pay for shipping and handling, and ill send a Radeon 9200 SE PCI, a GeForce 2 MX 400, or a GeForce FX 5600 XT.
Beed - ill take one card, you can take the other