Advice please.

Thank you all very much for your help I appreciate it.

The good news is that your amp is going to drive just about anything! And 20x20 is not  a "rather small" listening room - that's a lot of space to fill.
With that in mind, the aforementioned Reference 3A SEMA and the PMC will do well. You should also look into Dali speakers. They fill the room at moderate volumes as you mentioned.

What aspects of stereo performance are most important to you, and what would you like to improve upon over your current speakers?

What would I like to improve upon over my current speakers? Better sound - specifically better bass (read: more punchy bass), cleaner and more detailed. I’ve had 2 pairs of Focals in the last almost 20 years: Chorus 736 S and Chorus 836 S. The 836’s sound much better than the 736’s. But I have listened to both the Paradigms and the B&W’s I mentioned in my original post and can not decide between them. What I was hoping for was some input/opinions as to which would be better Or more appropriate for listening to rock music. It is the only music I listen to except for the occasional jazz fusion bands. I do not want to buy a pair of Cerwin Vegas or have to add a subwoofer. Just looking to improve over the 12-year old Focals i now have hooked up but to improve over all especially the bass. Thanks.

You might want to listen to a pair of the Acoustic Zen Adagio speakers, they run around $4,500.00 a pair but can be had for less if you shop around.