[morzh]

Well. What can I say....if you are only holding it as a conversation piece that "still sounds pretty good" - don't touch it.
However if you intend to sit in front of it, turn it on and listen to it awhile - yes, do the recap.
This said, those are pretty intense inside. Not really intense, but pretty so.
And when you start on it you might find out there are some wiring that starts to crumble and needs to be replaced.
And if you want to keep the spirit, (I am sure if it still sounds nice the resistors are more or less usable) you might get into re-stuffing the old caps so it looks the same. Which will take some effort.

I guess it is your call after all.