Quad SLI is deffinately an option.However,as the owner of a 7950GX2,I do kknow that NVIDIA has some serious work to do on their quad SLI drivers.As it stands,quad sli drivers suck,and quite often the quad setup performance is very poor,even compared to a single card.That's the reason I don't run 2 of these cards right now.Quad SLI is very feasible and so is running up to 6 monitors from them.Just need decent drivers from NVIDIA.Goodluck.
Dahak
M2N32-SLI DELUXE WE
X2 5600+ STOCK (2.8GHZ)
2X1GIG DDR2 800 IN DC MODE
TOUGHPOWER 850WATT PSU
EVGA 7950 GX2 550/1400
SMILIDON RAIDMAX GAMING CASE
ACER 22IN WS LCD 1680X1050
250GIG HD/320GIG HD
G5 GAMING MOUSE
LOGITECH Z-5500 5.1 SURROUND SYSTEM
500WATS CONTINUOUS,1000 PEAK
WIN XP MCE SP2