Ah, well, this isnt much of a surprise, or well, shouldnt be.
All my major heat sources arent in the case. the rubber hoses remove the heat from the gfx and from the gpu so that the system really has no heat left to remove except for the chipset and motherboard components. I have at the moment:
939 Asrock dualsata2 board
2 gigs of patriot memory - love this mem company, always 1T at tight timings
160 Gb samsung spinpoint 80
350 Phantom psu
Antec slk3700 with psu removed (i like the solid door and reverse mounted HD cage)
4200+ 2.2ghz dual core 939 chip
x1900 all-in-wonder - what a wonderful card and it runs cool too as it is underclocked
slighty and has only 256megs ram. full 48 shaders and full pipelines though of the x1900xt series.
I keep my papst at 8 volts. I have tried it at lowest voltage which is about 5.5 volts (my fan controller doesnt go to exactly 5v) My computer was fine and stable for a few days but I feel life is safer with a cooler computer. The papst pushes a LOT of air at 8 volts, more than my nexus 120 does, noticably so, at like 11-12 volts (my fan controller also doesnt go up to 12 volts completely, its freaky) I would get a papst again if it is as smooth as this one. The air volume it pumps is fantastic. While it might not be a nexus in absolute silence terms, it can 2x outperform it for any given voltage (maybe moreso!)
the r600 will have the new Zalman2 system in it. It is either that or I get another discounted Zalman1 tower

. I always dreamt of having two towers in a super gaming rig. One tower cooling the chipset and cpu, and one tower cooling just the gfx card and vga ram (zalman has a loop for that cools the ram now).
Overkill? yes. 100% silent, yes. My pump is inaudible at 1 foot from it with my ear facing it. i can hear it if I put my head 6 inches from it and turn it off and on to notice a difference.
My new system will be a bummer however. I really am not looking forward to having to use two pci-e power cables. I will then need to be using my new corsair 620 which has a fan in it. that means I will be using 2 fans. Very uncool for what I have been accustomed to!