It doesn't look like the most uber fan ever made but from the umpteen reviews I've read it seems to be better than I first thought, no cards have been crashing due to overheating and it seems the noise isn't as bad as you may think from a smaller fan.
I'm gonna run with it as is, using the stock cooling and if it turns out to be not up to snuff then its gonna have to be a 3rd party heatsink I guess.
Still waiting for some forums members to mod their card with a new heatsink before I buy one though, want to be 100% sure its gonna fit etc. . .
btw: Tom, why don't you flog your GTX and get one of these?