Well my AC accelero is much cooler for no noise. The 8800GT stock cooler is a joke, end of story. I got my card near to release and read enough horror stories of it breaking down, overheating etc. Turned the fan up to combat that and it sounds like theres a nest of wasps inside my computer. Take off the anorexic cooler which is caked in far too much TIM, put on the AC, the cores at 35 degrees now. With the stock cooler it would idle at 65 and cut out during games. Now whats the point in that?
To the o/p, an 8800GTS is probably the best bet, the price is so close and the cooler does look to be much better than the GT so no real need to upgrade urgently.