Tube Amp recommendations to drive Klipsch Forte III

How good?  You got a price range?  Power requirement?  Features like remote volume control?

I recommend having pre-out/main in to allow for future options, especially if wanting to move the bass frequencies away from the tube amp via a crossover (separate or in a sub), and return everything above low bass to the tube amp.

I assumed (hah) and discovered my Luxman SQ-N150 does not have that.

I also think staying in the 30/45 wpc range leaves future options that the 10 wpc amps cannot handle.

Vintage: lately I think: pre-arrange: buy and ship directly to Audio Classics (or your chosen firm) for an overhaul before you get it. That total cost is lower than a lot of new equipment that lacks so many features I find valuable.

Remote source switching is not needed IMO, but remote volume and remote balance is essential for me, so I run non-remote stuff thru Chase RLC-1 remote line controller. This one is a good price, has the remote (definitely needed), and free 60 day return

https://www.ebay.com/itm/124899959382?_trkparms=ispr%3D1&hash=item1d149e2256:g:oJUAAOSwl9BhQB7j&...

What currently available add-on can give remote control to vintage equipment?

+2 Quicksilver

Quicksilver mid monos are very good, hard to beat at the price.  The latest version has separate bias for each tube.  Pair them with QS preamp for an awesome combo 

Rogue Audio Cronus Magnum iii is an excellent sounding match with the Forte Iii. They really wake up with more power than the typical tube amp and the Rogue gets it done with its 100 Watts per channel.  
Tunes up extraordinarily well with some NOS 12AX7 and 12AU7 tubes too.