Klipsch Cornwall IV and Luxman Integrated

It sounds fantastic! Stick with a class A, 550 or 590, both will have more power than you’ll ever need

I owned the 590AXII and really loved the sound. However, in my opinion, you're better off pairing your Cornwalls with a nice tube amp. The Luxman is more on the neutral side with just a hint of sweetness/warmth. Plus you don't really need that much power with these speakers. There are many excellent class A tube amps -- I owned the Audio Hungary Qualiton a50i and considered it to be better (for my tastes, of course) than Luxman 590AXII.

Thanks guys, I have the cornwalls currently paired with the MC275s in mono mode (150w p/c). Was thinking of adding a SS amp to the mix. But useful insights. Thank you

if i had cornwall 4's as speakers (i don't), i would use this, or something like it

https://www.usaudiomart.com/details/649979053-original-cary-cad-300-sei-a-300b-6sn7-integrated-wonderful-blue-finish-remote-upgraded-caps/

You can't go wrong with a Luxman Integrated or a tube amp or integrated. Just different flavors depending on what you prefer.