Tube Preamp with Solid State Amp?

Love my combination of Parasound A21 + Backert Labs Rhumba 1.3 which is a tube preamp. The resolution, soundstage width/depth and impacts are stunning!

I been running a tube pre (mullards) and a class D PS audio amp for years.  Has a great sweet spot at moderate levels but the punch can be fatiguing at higher levels.  Been considering trying a class A/B power. Love how cool the Class D runs.

That's exactly how I set up my system and I like it. I was doing so much streaming that I thought a tube preamp would add the right dimension and it has. I read about the Prima Luna Dialogue for a few years and finally added it to a pair of SS amps. The result is great. Only drawback is you can leave the SS amps on all the time but you have to switch them off when you turn on the tube preamp but that's the only drawback I've experienced over the years.

I run a deHavilland Ultraverve tubed preamplifier, modified with Dueland caps into a big Bryston 14bsst amplifier. Very nice results!

As you have Klipsch, I'd recommend keep your P5 and try swapping out your A21 with a tube amp.  I tried tube pre/ss amp a long time ago (Audible Illusions+Exposure) and really liked it, but practical considerations in integrating HT with my stereo setup kept me with SS pre/pro.  I recently moved to Rogue amplification, and have never looked back.  Audition a tube amp and see how you like the sound.