I like the idea of TY143B. 1800 rpm is a good balance, if you know what 2500 rpm sounds like
Id get a few, 90cfm is still pretty decent, and would more than likely find a home in my case as either intake or exhaust, or both..
3770K @ 4700MHz 1.375v/Le Grand Macho RT/TY-143/TF8
Asus P8Z77-V/12GB G.Skill Mix @ 933MHz 9-10-9-28 2T 1.57v
EVGA GTX 980 Classified @ 1500/2000MHz
Intel 545S 256 @ Raid 0, WD 1TB Black, Toshiba 1TB
Fractal Design Meshify C TG + Many CFM's /CM Silent Pro M2 850