I have an API conditioner with an alarm hooked up to our computer and for periods of months at a time, the voltage has dropped enough to set it off many times a day. Your equipment will probably sound the same as it does now. A power regenerator (such as PS audio) should keep the voltage steady I would imagine. I used to use voltage regulators on test and sonic welding equipment, but have never seen them used on audio equipment (even by EE's who were also audiophiles). I have heard that low amperage (long term) is what puts additional stress on components (not a minor change in voltage). Low amperage for example will cause quality light bulbs to burn out in a week or two.
