I just got my H60 in tonight. Installed it in my Antec 900 case. I had to set the fan to intake or else the unit would not fit in the case without modification.
At 4.2Ghz, my temps went from 60C full load to 51C same load (LinX). Using Prime95, my temps went from 56C load to 49C same load. I am amazed how much of an improvement this was over my Zalman cooler. Never going back to air coolers again.