I would go with a PCI 2.0 card and then you double the bandwidth anyway and you can scrap the SLI mode and be get more FPS for games that don't support SLI....I have SLI and belive me....it sucks to find out most games crash with the SLI enabled....
I agree with Proximon....get a P45 board...you can't go wrong...if you find one with DDR3 support you can double your data rates too, and if you want to OC you can goto 1600 FSB speeds all for a feww dollars more compared to going with an SLI....
I have 2 BFG280 OCX and belive me that they smoke the competition, but factor in a 1100 watt PSU and all the tweaking and patches and not being able to play most games online...it's discouraging sometimes...
I also noticed that when I bought two more PC3 DDR3s my frame rates doubled in games......I think it has something to do with the way Vista 64 allocates resources memory...
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