Where do you folks find a 3 year old thread to resurrect?
I spent a lot of time and parts swapping in search of silence when I initially got into watercooling over 2 years ago. I got into watercooling for silence as at the time there were no good heatpipe solutions like there are now. I don't know what you folks are doing, but my system is very, very quiet. I have an MCP350 pump with 6 yates at 4v ea. The pump is actually louder than the fans, and with the PA120.3, it cools whatever I throw at it all day long. Our refrigerator two rooms over drowns out the computer it is so quiet.
I have found that leaktesting with air before adding water is very beneficial. It sure makes for less hastle when setting a loop up. On my current setup which I just upgraded to a C2D and Fuzion, I leaktested with air first and sure enough found that one of my res barbs was leaking. It was nothing but a simple matter of pulling the barb back out and sealing it better to fix it. I had nothing to clean up and no draining/refilling to do before I could fix it.