Tuniq Tower 120, Thermalright Ultra 120 eXtreme, Zalman 9700NT, xigmatech are putting out good coolers at the moment but you'd have to confirm they can be screw mounted, Worshipme was looking into this, ask him what he discovered if he posts here.
Alrighty, thank you for the brands...I tried using a heatsink with the pegs once...but I still had the screw plate in the back..so it didn't go over so good...being loose and all
After doing a bit more searching, I found that a lot of people had been complaining about the push-pin mounting in Xigmatek's HDT-1283, and Xigmatek answered by releasing a bolt-thru mounting kit: http://www.xigmatek.com/product/accessory-crossbow-adk-i7751.php
Click on "Where to buy at the top of right hand corner of Xigmatek's site to find out where they are available. Nowhere near me unfortunatly.
one that is not very expensive but performs well is the ARCTIC COOLING Freezer 7 Pro 92mm CPU Cooler, good reviews and inexpensive, $30 with free 3 day shipping...
Just back with an update and after searching a few forums, I can confirm that the Xigmatek HDT-1283 can be mounted using the screws and backplate of the Thermalright bolt-thru-kit.