SC, the general rule is if you're not overclocking, then the retail HSF is more than adequate. However, if you're planning on pushing your P4 then you need to consider alternatives. Compared to Athlon there are not a lot of options in P4 (esp. 478) land today. The Sunflower looks to be one of the better options. The only rub I've read on the Intel retail HSF is that it grips the board so tightly that it can bend it.