Yes; everything you suggest could prove worthwhile.
Many years ago, Dave brought over a PS Audio power regenerator and we heard no difference with the system plugged into it but that system was much less resolving than my current gear. We live in a rural area of large parcels, with a separate transformer assigned to each property. There is a sub-station about a mile away and something could've changed over the years at that end. I'll admit to knowing nothing about power.
Thanks for your kind encouragement.