I have heard Alphas are good. I've also heard the name GlobalWin.
I say whatever does the trick is great! I have a noname h/s with a BIG fan! 26cfm on top of that puppy! I had to build an adapter to mount it on the h/s though! Keeps the chip really nice and cool! I don't think expensive and EFFECTIVE are always hand in hand! I know I am gonna take some CRAP about this because I am a newbie here, here is how i see it!
Big H/S + Big fan CFM = good cooling!
Ofcourse, there is a limit to fan cooling! Depends on what you are running and how fast you are running it! My k63-400 is happy with my setup, and so am I!
OH yeah, if the temp in the case goes up, ie ambient air temp inside, all the h/s and fan will do no good! Can't cool blowing HOT air ! Also get an extra case fan if you can!
Modest words of a humble fool !!!
You don't know the POWER of the dark side....
It has been shown that many cheap thin fin heatsink are almost as effective as large, expensive cold forge heatsink when coupled with a powerful pan (ie YS-tech 26 cfm fan) ... you have learned well, my young grasshopper.