No difference between a vintange and a modern system as far as need for ready current.
NEVER use a surge protector on an amp. they limit current flow.
If you can't swing a $5k regnerator, then plug directly into a wall. Unplug when storms come.
"Conditioners" are often filters that try to filer out the noise and they also limit current.
as you can see I'm very skeptical about power products, with good reason, there are many bad ones out there. There are a few good ones. I settled long ago on the PSA PP10. I haven't tried others but I've talked to others who have and there are a lot more failure stories than successes. Unfortunately there are good reviews of all the bad ones. Hard to do the research.
Best of luck.
Jerry