GlobalWin have a winner on their hands with the WBW76. An inexpensive price, excellent cooling performance and easy installation make this a hard-to-beat product. The Evercool NW6-610 shouldn't be written off either. Its main constraint is the small fan. When I placed a 6800RPM Y.S. Tech model on top, the results beat even the GlobalWin unit. And the fan rotation alarm is a nice touch as well.
Consequently, I have no option but to award GlobalWin's unit the trophy. If Evercool released the same sink with a faster fan it may be in the running as well.