@OP
WOW - And there’s me thinking I had ’Valve (tube to you guys) Anxiety’! You’re worried about replacing them every 5→10 YEARS?!?!? I wish! Sounds like (no pun) you hardly ever switch you system on! I have a Ref 3, which I believe uses the same tube complement, and, using ARC recommended replacement period of 4000hrs for best SQ (although recently a correspondence from ARC said 2000hrs is best!!) I need to replace my set every TWO YEARS!! That costs me MORE than it does to run my car! 6H30 EH are c£70 each at the moment here in the UK, which is why I bought from VivaTubes over there at $60 each, and 6550WA’s are also becomming scarse and rapidly going up in price, mainly due to the ’Russian Problem’!
Back to your dilemma - due to my continued valve anxiety, I too am considering a change to an XP-20, even though I love the sound of the Ref 3 into my Threshold Stasis S300 II, and maybe a good or better match with an XP-20, into my Maggie 1.7i’s. But I cannot hear an XP-20 first, as I cannot buy an XP-20/22 before I sell the Ref 3 due to being a cash strapped pensioner. So I have a very similar situation to you, except I use my system a LOT more than you seem to do in that tiny tiny room of yours.
Good luck, and please repport back once you’ve listened to the XP-32.