Cheapest on Staticice is this by nearly half ($71).
This cooler was designed with passive cooling in mind, but can also be used with up to 2 fans. It is a massive heatsink (as passive heatsinks tend to be) but will do the job if you have some case fans etc helping.
SPCR review: http://www.silentpcreview.com/article837-page1.html
PCCG has responded to my question about mounting:
The CoolerMaster Hyper Z600 we have in stock is an CPU Cooler only,
In addition, to fit into your system, you will need to purchase the CoolerMaster LGA775/1156/1366 Retention Bracket.
link provided in the above text: http://www.pccasegear.com/index.php?main_page=product_info&p...
Even so it's a very good deal for the cooler :)