I can recommend Taisol heatsinks and fans. http://www.taisol.com/coolers.html If you get a heatsink that has thermal compound already stuck on wipe that cheap s*** off with an alcohol based cleaner,and replace with something like Arctic silver. If you've got room in the case,a couple of 80mm case fans will also help with the cooling.One in the front pulling cold air in,and one in the back blowing out. Sunon,Evercool or Delta do a good range of fans,Although as XPerties mentioned some people find the Delta's a bit loud.