Y'know, I haven't done much with watersinks, though I have a prime candidate HSF to make one from. Ever see Joe's review on the Globalwin
CDK-38 ? A pin HSF made from one piece of copper, not aluminum pins staked into a copper base. I have one and am seriously considering converting it to a watersink, just for something to play with in the shop. I think it has potential. Otherwise, a well designed waterblock will serve your needs if you just want to buy something that works right out of the box.
Hoot