Tube Amp recommendations to drive Klipsch Forte III

@ronwave, 
At a very reasonable cost the Luxman SQ N150 would pair well with your Klipsch Forte III.
Charles 

I have heard the SQN150 with Forte III and they sound great together. Only 10 watts I believe but 10 REALLY good sounding watts. Probably a good fit for small to medium room. I am currently using a pair of Quicksilver Mid Mono amps with my Forte IV which are 40 watts and can use just about and EL34 or 6L6 variant. Maybe check out their 20 w EL84 integrated

I also have Mike’s headphone amp and its killer. They are a huge value for the money

Any of the Octave Amps would deliver to those big boys. I presently have the V70 Class A driving Spatial M3 Sapphires and it is sheer bliss.
The V70se or V80se are just incredible amps as well. If you are not familiar with them. Good Luck! 
https://octave.de/en/index.php

I have driven my Klipsch Quartets with both a Grommes PHI-26 (6 watt) and a Decware Mini Torii ( 4 watt) tube amps.  Both sound great.

+1 Quicksilver
http://quicksilveraudio.com/products/integrated-amplifier/