tube integrated for Harbeth under $2500

I've heard the Rogue and Jolida integrated amplifiers with Compact 7 and SHL5. If you are tube-centric and like pursuing nos tubes on the internet, either of those makes is just fine, but IMO similar watts from an LFD Mistral, Zero II, III integrated (granted supply is more scarce, but used slot under your $2500) is a path to real simplicity and pleasure without the negatives. fyi - I've owned and enjoy tube and SS systems.

I used a Vac Avatar Super on HL5's and they were absolutely excellent together.

I highly recommend Mastersound amps (hand built in Italy).
Several are available in your price range. I use the 300BSE with the SHL5 and really enjoy the combo. Dale, at Eugene Hi-Fi carries both Harbeth and Mastersound. Could be a good source.

Technically not tubes, but you might consider a Pathos Classic. Basically, a hybrid piece. Or, the Unico gear.

PMB

I use a Unico, love it with Harbeths.