"I'm also looking at a Primaluna tube phonostage"
Mine is a week old. Found a barely used one at significant discount.
I have a tubed unit in the shop, originally was getting an inexpensive SS unit for the time being. PL was an impulse buy because of price/brand reputation.
To my ears its everything the reviews(not many) mention. It is quieter than my Fosgate. SQ is about the same until a side by side comparison is done.
If you're a press your ear against the speaker type to listen for tube hiss, go with something other than the PL. Otherwise, the performance/build is what to expect from the brand.
Years ago, I demoed that Zesto model in my setup. That's an okay price, but they show up now and then used for less.