I originally used a Panaflo L1A, but it was a two wire fan w/o speed sensor.
Panaflo
Today I received a Vantec Stealth which has slightly more flow at same dB level.
Vantec Stealth Fan
This fan has a speed sensor and seems to be well built, but so are Panaflos. When I open the VIAhm it says the fan is running at 2570 rpm, but spec says it runns at 2050 rpm. The 5v supply is reading 5.03 so I am not sure why there's a speed difference.
Processor temp remain unchanged at 40 to 41 deg C.
Sound wise it seems slightly less, but probably the same.
I am using a Chieftech Matrix Case
MX-01BD which has 4 case fans, where I am using all Panaflos L1A's. Considering all the fans the system is relative quiet, only a slight whirring.
mdcrab