Doesn't a bigger hub ensure higher SP? Read it somewhere. I love them as they are. I got three in the front as intakes behind a bouble filter (the mesh/filter from the front panel and a Silverstone filter attache to each one) and I can feel the air blowing out from the back of the case. The noise at full blast is not that bad. I have heard worse fans with lower cfm ratings.
2/21/15 at 12:00pm