Usher TD-20

Usher makes their own amp that I think is a tweaked version of Threshold Class-A amps, so maybe take a look at that as well.

I’ve looked at the amp several times. Sounds overall like it’s a good amp but the thing I keep reading is the high end is a little rough. 

Sounds overall like it’s a good amp but the thing I keep reading is the high end is a little rough.
 

@mofojo That’s a little counter intuitive given the amp’s Class-A architecture.  I also have to believe the makers of the speakers chose an amp to work optimally with their own speakers, but there are always the all-important personal taste and system synergy factors that come into play, so who knows?

Yeah dunno there were just several reviews and the only bad thing they had to say was about the highs. Not they were bad but just not as refined as the rest of the range. I came close several times to pulling the trigger on used local ones. 

You can also up the bias on the Usher amp to make it sound better.