I can't help but laugh at the people getting their panties in a bunch over a .5degree difference on a waterblock given particular conditions. I mean, both the GTZ and the HK3 are great blocks but at the end of the day, ease of use will win the GTZ a lot more praises than anything else. If anything, Swiftech should be praised for the innovative mounting method that they introduced rather than on the marginal temperature differences that there may or may not be between those three top block :P