Best amplifier for klipsch heresy 3 speakers.

I've enjoyed Musical Fidelity integrated amps with my Klipsch Forte's. Deep tight bass, nice mids and detailed, but not bright highs.

If you are really uncomfortable with the sound of the Heresys then perhaps the better part of valor would be to sell them and start over. I realize that you may not recover all your funds but the money you'll spend trying to get them to "sound right" may add up fast.
I never gave up myself with my JM Labs Electras and eventually found the right combination of gear to make them sound great.
I started by telling you that you may want to get some used Cardas cables, that had a big impact on tone. I eventually found that Tube power amps did the trick in combination with a specific type of tube pre amp. But it took 5-6 years to figure it out and to budget enough money to do it.
There are a lot of inexpensive tube integrateds out there that you should keep an eye on. As mentioned Cayin. Jolida, and I will add Prima Luna amongst others, but I thought you said no tubes? An older British tube amp from Quad might be the right thing. You will only know if you actually try it in your system, there is no really quick cure in most cases of "Trebelosis extremis".
Do some homework over on the Klipsch Forums as suggested for more ideas and advice. BTW I have my LaScalas attached to my old small SS Mac even though I have several tube amps I could easily use instead!

I don't understand the issue with a wife working out in the same room as a tube amp...but, of course, I can guess: Sweat beads landing on tubes causing them to crack, a large plastic exercise ball melting and popping from hot tube contact, tube glow reminding her of fading love and vanishing youth, she prefers there be no euphonic harmonics taking the edge off of Joe Scarborough's innanities, there are cables running under the Bowflex, she thinks "I have to get in better shape so he spends more time with me and not this stupid hifi hobby", splashed chlorine from the lap pool is making the amp smell like a small town YMCA locker room, extra heat from the tubes are causing the emergency food rations stored in the basement to rot...or something...

I dont know if you think your a comedian or not but the reason im asking about the tube amp is that my wife does extreme workouts like tapout and the insanity workout.

I've been using both a McCormack DNA-1 (SS) and an Audio Research VT100 mkiii (tubes) with the Klipsch Heresy III's to good effect. The ARC is a little warmer than the McCormack. Preamp is either an ARC SP-10 mki or an SP-11 mki.