I can't really help you with a GPU cooler. It is more common to get custom CPU coolers than GPU coolers. I have never bought or installed one. Usually you just buy a graphics card with a good cooler already installed. Somebody else will have to help you out there. Since your temperature is ok though, the only other issue is noise. You should make sure that it is you GPU and not your CPU that is too loud for you, so that you don't change the wrong part.