Need help with integrated amp selection

With that speaker I would suggest you not use tubes due to its impedance characteristics. I think an 70 watt Pathos integrated hybrid (maybe above the price range) might be worth considering. You don't need a lot of watts to drive these speakers, but you do need some current to drive and control the bass.

I do think the Pathos will be out of your price range. Accordingly, I would look for a used Sim Audio integrated. I think there i-1 is 50 watts or so, and that should be enough voltage drive for your speakers.

There are several used Musical Fidelity integrated amps in your price range. They have a reputation for tubelike sound. Check Stereophile archives for reviews. Sim is good too.

That Music Fidelity A1 up for sale could be very interesting, if it is anything like the original from a few years back - is this one Class A also - if so that could be interesting indeed, 35 watts should be enough power for your speakers I would think.