Thanks everyone for the good advice 
I am now leaning 51/49 towards the 470. Hardware wise the Ati may be the better card regarding power and temps, but due to past hassles with Ati drivers (here's looking at you HD 4870) I am probably going to stick with the green team.

I am now leaning 51/49 towards the 470. Hardware wise the Ati may be the better card regarding power and temps, but due to past hassles with Ati drivers (here's looking at you HD 4870) I am probably going to stick with the green team.