Just an update, I've now been running my new setup for over 6 months and I have to say I have NO regrets! Everyone talking about issues with SLI must be basing it on experiences with crap cards cos I haven't had a single issue and setting it up requires absolutely no hassles (it prompts you to activate SLI when you first fire up windows). I have been trying to find a game that will push my cards but nothing I throw at them seems to bog them down. I max out all my settings on Prototype 2, Skyrim, Fallout NV, Civ V, etc and it runs a charm. My windows experience score is 7.9 too.