Amp recommendation for Klipsch Heresy

If you can find a nice Nakamichi Stasis amp or Receiver that would be my choice. Plenty of info online. Audiokarma mbrs are pretty high on the Sansui AU series also with Klipsch...

I would suggest a Carver 'the receiver'. Great 80's hifi there.

Something different for you to consider- not a 70's or 80's amp, but I would recommend a rebuilt Baldwin amp by Will Vincent. He goes by member name "Autospec" here on the Gon. I haven't seen any for sale lately by Will himself, but they come up from time to time in the classifieds. There's one for sale right now over on AA, but it's a "Super Baldwin" and he's asking $800.00. I know you can get a standard one for around your price range. Had one driving my Klipschorns for a while and they were a match made in heaven. That Baldwin amp held its own up against some very expensive amps I had.

Sophia Baby Amp drove my Khorns with ease.

tubes may be noisy with sensitive speakers. vintage mcintosh tube amps are great when properly serviced and restored so is hh scott ones. if you can do restoration job yourself you'll save $$$ otherwise you need to be in $800 range.