Thermalright MUX-120 Quiet CPU Cooler for Socket 1156 - $44.95http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=46_557_778&products_id=26904
I have one of these and it's dead quiet 19db for real,i had to check if the fan was spinning for the first week occasionally.
Comes with Chillfactor II paste which is better then AS5.
It's 160mm tall and fits Corsair Dominators 52mm tall all dimms filled.
It may not be the "best cooler" out there but $80+ coolers for SB cpu's are a waste of money imo.