i've done a lot of reading and a lot of people like the enermax auto-temperature controlled fan 22 cfm 18 dba at 1000 rpm to start.....and it can go all the way up to 33 cfm 29 dba at 2600 rpm...... if u want it to go fast just stick the temperature probe near the cpu.......if u want it always slow just stick it to the fan itself
Specs from newegg........
Enermax Thermal Control 80MM cooling fan . built-in heat sensor. Fan speed varies according to temperature. Dual ball bearing. Extremely quiet when in sleep mood. 3-pin with 3-4pin adaptor. Screws.
Specifications: Low - 25C-1800 RPM 22CFM-18dBA, High - 65C-2600 RPM 33CFM-29dBA. Meets all safety standards, such as UL, CSA, CUL, TUV, CE, etc. Retail.
feel free to criticize my recommendation...... i actually want u to..... cuz in 3 days i'll be ordering 5 of them with my rig
edit: btw the enermax fans are like half the price of a vantec stealth.............. i think......... feel free to comment