sunon has a nice selection of fairly high output, quiet and standard case fans. I have 1 of those 131cfm ys tech's as a blowhole and it bully's the air. also i hear panflow were good but ive personally never used them.
I have ordered from MPJA several times. Anything from LED's to fans to 12V power supplies. My only complaint about them, why do they only ship via UPS ground? UPS Ground from Florida to Oklahoma takes forever, atleast 7-9 days.
I've got a 105cfm 120mm ys-tech sucking air in at the bottom front, another sucking air over the pci cards, one drawing air out over my radiator, the psu fan exhausting air out and a low cfm (~23cfm?) 60mm fan sucking air from the area below the psu. All the 120mm's are running 7v, cos it's too damn noisy otherwise (esp. when watching DVD's :-D ). I did have a 131cfm ys-tech, but it was so loud I had to swap it out with one of the 105cfm ones. Probably about 150cfm going through the case, keeps it pretty cool