Thanks, tony...the fans I ordered come with silicone gel mounts instead of screws...same concept, I think.
Portwineboy...I have the same reservations about those...my rig is rackmounted, aluminium, and I gained 10вк just by switching from the same design case, made of steel. At this point, almost all the noise comes out the back, from the case fan and the power supply fan, so the batting wouldn't really help much there...might help with the drive noise, but since I'm probably lowering the CFM with these quieter fans, I don't want to take chances with heat buildup.
I talked to the guy at SilenX...I think this must be a pretty small company, because the customer service rep was on a cell phone
. Also, my order confirmation was order #96. Anyway, he says that the fans are capable of about 14dBa! That's incredibly quiet, for those of you who don't know A-weighting for th decibel system. He said that with his fans, you get about 1 CFM per decibel, and it's variable from 14 to about 28. So, I guss this means I'll be able to get a good balance of sound/performance.
MPEDrummer