Psychicanimal, it sounds like you have some experience in industrial power systems, or something similar. As you mention, there are a ton of ways to address providing low noise power to an audio system, and some of the ones that are marketed specifically for audio applications either do nothing, or do more harm than good.
However, there are also some that are excellent. As Warrenh says above, some type of power conditioner/noise filter/isolation device is almost mandatory. A good option that has not yet been mentioned would be a PS Audio Ultimate Outlet. The UO is non-current limiting, and provides noise suppression, isolation, and surge protection.
A step up from any power "conditioner" is an AC re-generator, such as the PS Audio Power Plants. These devices take AC line power, convert it to DC, then re-generate AC, free of harmonics and noise. No passive device can do all of the things that a re-generator can do, at any price. The down side is that this solution is best suited for low power devices, such as pre-amps and sources, because regenerators large enough to power big amps are as expensive as the amps themselves!
Whatever you decide to try, give it a good listen and make an honest judgement. I can honestly say that every change I have made to the power delivery to my system, including changing out stock power cords with home-made cords, has made an immediately audible difference. If you add a new cord or conditioner, and after a couple hours of listening you don't think that you can hear any difference, then there probably is no difference. Yank it out, sell it, and try something different.
As a final thought, I doubt there are very many of the 90 IQ crowd reading the forum on A'gon, and anyone who plans to take the DIY route for building a power delivery system for their Hi-Fi rig better be closer to the 120 range or above. Electricity can do wonderful things, but it can also destroy your gear, kill you, or burn your house down(not necessarily in that order)if you screw up. If you don't have the background to roll your own, buy something pre-packaged and follow the directions. Good luck,
Mike
However, there are also some that are excellent. As Warrenh says above, some type of power conditioner/noise filter/isolation device is almost mandatory. A good option that has not yet been mentioned would be a PS Audio Ultimate Outlet. The UO is non-current limiting, and provides noise suppression, isolation, and surge protection.
A step up from any power "conditioner" is an AC re-generator, such as the PS Audio Power Plants. These devices take AC line power, convert it to DC, then re-generate AC, free of harmonics and noise. No passive device can do all of the things that a re-generator can do, at any price. The down side is that this solution is best suited for low power devices, such as pre-amps and sources, because regenerators large enough to power big amps are as expensive as the amps themselves!
Whatever you decide to try, give it a good listen and make an honest judgement. I can honestly say that every change I have made to the power delivery to my system, including changing out stock power cords with home-made cords, has made an immediately audible difference. If you add a new cord or conditioner, and after a couple hours of listening you don't think that you can hear any difference, then there probably is no difference. Yank it out, sell it, and try something different.
As a final thought, I doubt there are very many of the 90 IQ crowd reading the forum on A'gon, and anyone who plans to take the DIY route for building a power delivery system for their Hi-Fi rig better be closer to the 120 range or above. Electricity can do wonderful things, but it can also destroy your gear, kill you, or burn your house down(not necessarily in that order)if you screw up. If you don't have the background to roll your own, buy something pre-packaged and follow the directions. Good luck,
Mike