Well my main problem is the cost of the fan. I don't have the funds to shell out for one. I am currently using the Taurus FM with a SPAL PWM controller, but I can only use the low speed because of the massive draw this thing uses. The HHR fan uses less amps, moves more air, and is decently affordable. I would use the Mercedes fan if i could find one cheap enough...seems like the trigger wire setup on it would work with SPAL controller and it moves lots of air, maybe I get lucky and stumble over one in the pullapart...