I've got a Resorators2 on my system (see sig) temps are higher that my Thermalright and 120mm Ambers (@7v) were, but my system in now silent.
I run it 24/7 with the F@H smp client in my bedroom and i can still hear my son breathing in the next room at night. I would never go back to using fan's again and the wife loves it
I will be installing a quad soon.
As to a 6600
and a GTX on the Res1+ at stock fine - but don't multi-task while gaming.
If you want to OC your system, put the 6600 on it's own loop and the GTX with active cooling (only needed when gaming so your ears will be filled with sound anyway)
The Resorators are designed for quiet - not high OC's
If you want both then the alphacool cape cora system is for you (but it's not cheap and needs space)
Hope that helps
Edit: just reread your comments, personally I wouldn't passively cool this (air or water) as a high flow rate would be needed to remove that about of heat, but then again zalman have a
GTX block made for the Resorators so who an I to disagree