Like was said earlier, if you have the 4 mounting holes around the socket, the Swiftech MCX462+ or the Alpha PAL8045 are both excellent choices and you should be able to find some good deals on the Alpha. I have both and they both do a wonderful job with the 45cfm versions of the Delta focused flow fans, which aren't noisy like their higher cfm bretheren.

The Swiftech will fit any mobo that follows AMD's recommended keep-out zone and height restrictions where the Alpha has minor clearance problems fitting on some mobo's, but can be easily modified with a dremel for clearance of caps, etc. My MCX462 is presently cooling an XP2400 running at 2.2 and 1.75v and the Alpha is cooling a Tbred B 2100 at 2.35 and 1.85v, so they both can handle high heat applications very well. Plus, I really like the 4 hole mounting method better than the clip method. If you use self-locking nuts with a nylon spacer on the standoffs on the mobo(the Swiftech comes with these already and you can buy them at the Lowes store here in New Iberia too) you will have no problems at all with the standoffs turning if you had tightened the mounting bolts too tight when you go to take the heatsink back off and they are a snap to remove and replace for processor changes or for cleaning.

One other thing about both of them is that they are large, so that they will even cool effectively when clogged with dust bunnies, unlike smaller hsf's.