So if I had vista and 2 monitors, SLI would be useless, untill I decide to play a game like Call of Duty 4? Then Id have to turn off 1 monitor, and turn on the SLI? Which would be annoying, but not require a reboot?

So SLI = lose if you run 2 monitors it seems? If I do plan to stick with 2 monitors, would I be better spending the ~400$ I was looking to spend on the 2 cards, for 1 beast of a card? Would it be less or more preformance when I do play Call of Duty?