The FX chips do draw allot of power and the extra heat generated in and around the socket area can be quite noticable compared to other AMD CPUs even the Six core PII's. Some guys have been paying extra attention to cooling the socket and VRM area of the motherboard with an additional fan. While in at newegg by chance I came across a cooler by prolimatech that kinda interested me as it will cool the cpu and the socket area all in one go.
http://www.newegg.com/Product/Produc...82E16835242007
I know it is out of your stated budget and probably overkill for your intended OC but thought I would bring it up you can see how it preformed compared to other coolers, your freezer 7 pro is also in the review and also for anyone else that may find this thread interesting.