Is it worth getting the higher priced marketed fans for quietness? I will hook up the fans to a Scythe fan controller, and set it to 5v and 800RPM, so would it be a waste to buy the scythe or noctuas at a high premium? I'm looking for absolute silence, for reference I can't hear anything from the Antec Tri-Cools on their lowest settings and I would something just as quiet as those. Do the design of the fins make a difference in the airflow? Should I just get a pair of cheaper Slipstreams, or some Yate Loons instead of the $15+ fans?