Should I buy a power amp.

My two cents: 

What is your use case? Are you primarily watching movies or listening to music? Because that changes everything.

For movies, a center channel is the move. Something like 70-80% of dialogue and on-screen action runs through it, so if voices feel like they're coming from somewhere vague rather than locked to the screen, that's your answer.

I think you've already figure out the power amp. Your system sounds great, you just love the way power amps look. That's a legitimate reason to buy something, but it's an aesthetic decision, not a sonic one. With 98dB-sensitive Klipsch towers and 100 watts already driving them, you are not power-limited in any meaningful sense. You could run those speakers with a modest receiver and they'd sing.

So the question to sit with is: Do I actually hear a problem anywhere, or do I just want something new? Nothing wrong with wanting something new. But if there's a real gap in your system right now, it's almost certainly the center channel.

Music mainly but I do want a full set up for movies. Ive spent quite a bit of money for my budget. Thats why I dont have a center channel. That and one won't fit as my t.v sets on the t.v stand. Its a long piece of furniture but ill have to get a t.v riser.

     I would love a McIntosh processor but those are expensive as hell.

No more than 5.2.2

Two points

1) Your Klipsch speakers probably won’t sound better with more power. But they might sound better with better power. So it’s quality over quantity in this instance.

2) A better amp won't sing without a better preamp. HT and surround processors need not apply if it's quality two channel for music you seek.

I thought going w the Anthem i was getting high quality, although I understand the mrx 540 isnt as good as the avm 70 or 90. I honestly wish I would have waited and got a processor and separates.