Monster Power PRO 2500 arrived Thursday safe and sound. Did a benchmark noise level test prior to installation. Then, after making room and rewiring everything, Ran a comparison test. Going from two power strips to a rack-mounted power supply is quite a change and all the equipment is sensitive to position of just about every wire. Not detected a significant change in background noise yet. In fact, hearing more computer processing noise, which leads back to the issue of where all the wiring is running and where the computer is positioned. More A/B testing is necessary. Latest discovery on the web is http://www.soundsnap.com/ where you can find all sorts of interesting sound effect, loops, and aural delights.