If you are going to use a watercooling kit, one of the best "bang for your buck" kits is the Natalus kits. I am curently using one on an AM2 Athlon64 X2 6400+ black edition CPU and it does an exelant job of cooling. Also, since it sits outside the case, it does not interfeer with the case cooling flow from the front and read fans cooling the rest of the board as some of the "all internal" kits do. Of course, you can get much better cooling if you custom build a watercooling system with individual parts, but you are talking a lot more money that way also.