I ordered a box of 36
Panaflo FBA08T12L fans , the 80mm slim ones, and they are great. Quiet at 12V, very quiet at 7V, and
dead silent at 5V. They just don't have the RPM cable, but I never really understood why people look at RPMs anyway... as long as its spinning, I'm happy.
If you can stand not having the RPM cable, I can sell you a few for
way below retail.
Otherwise, I'd look for some
Panaflo L1A's or similar with the RPM cable. The Vantec Stealth fans look good, if they weren't so freakin' expensive.