After only about a year of constant use, my Thermaltake Smart Case Fan II has apparently went out. Now, I need (want) a new case fan. I'm looking for some recommendations on an 80 or 90mm case fan. It should be fairly quiet (don't want to hear it over my already waayyy loud GeForce FX 5900), and have a good cfm rating. I can't really get one that auto adjusts itself according to how hot the cpu is since there's nowhere to put the sensor on my new heatsink. Any recommendations?