Smoothing power transients?

We have a whole house generator with ATS, and lose power briefly every few months. I expect there could be some brief transient when the ATS kicks in(?)

I’ve been running a low end Monster HTS-3500, and haven’t experienced any negative effects AFAIK. But that now is malfunctioning (low level high-pitch whine anytime it is plugged in, nothing else plugged into it or not).

Im a bit reticent to just plug everything into a garden variety power strip.

Any thoughts on a decent power distribution product vs true power conditioner to do the job? Don’t really want to spend multiple thousands unless really necessary.