wow so according to the chart for cfm/dba the cheaper UK3 seems to do much better than my San Ace across the board. Just too bad they are sleeve bearing for the application I was going to use them for. I wonder what kind of temperature difference I would see at different CFM's to determine if I should be switching to the GT's, I can sleep 4' away from my 3 San Ace going full blast no problem, but still.