Other option is to bypass all together and get a pure sine wave converter and Sealed AGM batteries for my music system??? Like a solar array but just for music. Anybody done this? It sounds perfect in theory by bypassing everything your power line and Power company is adding to the AC not to mention you have another power source when things go seriously wrong.
I would not assume that any such device works in a theoretically ideal manner, or comes close enough to doing so to be a good choice for powering an audio system, without persuasive evidence providing confidence with respect to the specific model being considered. Especially given that such things may not have been designed with audiophile applications in mind.
Specifically, I would want assurance that the inverter circuitry in the specific model does not generate RFI or other spurious noise in itself, that may couple into the audio system.
For example, it may have some relevance that I use UPS (uninterruptible power supply) devices on some of my computers, of the type that generates pure sine waves. And I can tell you that if I bring a portable battery powered radio within a foot or so of these things the high frequency noise radiated by their circuitry is picked up very strongly in the AM band. And it’s probably safe to assume that the many inexpensive UPS devices which generate stepped approximations of sine waves are worse in that respect.