Advice on Integrated Receiver

I auditioned these speakers (with PrimaLuna Evo 300) and I was not impressed.  And I think highly of Monitor Audio, I loved my bookshelf speakers. I just found no musicality/soul from the Silver 300s.

But maybe with more raw power? Under 5K you have a lot of choices.  such as 

The speakers are fine. I still own the MA Silver 8s in a second system. When they were in my main system I drove them with a Krell (150/300 W/ch) and a Vincent (also 150/300 w/ch).

@carlsbad no power conditioners, etc. in the setup.  P6 --> Schiit Mani phono pream --> CAX81 --> Speakers

Any floor standing you’d recommend? I know that’s a pretty open-ended question, just soliciting some opinions.

Frankly I'd consider new speakers rather than new amp.   These are the standard trendy design, smaller drivers (WAF) and lower sensitivity needing more power.  That said, 80 wpc should be enough unless you're a kid wanting to shake the walls.  People often limit their amps ability to drive a difficult loads with a power conditioner or power cord that doesn't support the dynamics required.  So make sure you aren't messed up there.

that said, you'll get better sound from a larger speaker with real bass drivers and a higher sensitivity. 

jerry