So what sorts of fans should I be looking for to replace the existing fans for my GPUs? I have 2x EVGA GTX 260 Superclocked GPUs and I'd like to buy more powerful and quieter fans since I have to run the stock fans at ~80-100% fan speed all the time in order to keep the temps to a moderate rate. When playing games like Rift, the speeds can go up to 75-78C on the first GPU (the second one doesn't run anywhere near as hot, but new fans for both would be better) and I think that's just a bit too hot for my liking. Since I have a job I can invest a bit more into fans than like $10 fans, but I'm not exactly made of money either. Also, the fans are extremely loud and even when my door is closed the fans can be heard half way across the house.
What would all of you recommend? (I like to hear what others would buy since a fair amount of you all probably know what is good.)
Also I greatly appreciate any responses to this since I really would like quieter and fans that can push more air away from the cards.