Advice please.

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.

+1 on the Acoustic Zens! I used to own a pair and really, really enjoyed them. Moved on to my current Spatials only because they pair better with my amplifier. But the Adagios are killer speakers that resolve beautifully no matter the volume.

Try giving Robert Lee a call (he makes them). Tell him Simon recommended you talk with him. I doubt he'll remember me but I called him on the advice of another Audiogoner who recommended AZ's and it was a pleasure talking with Mr. Lee and perhaps getting a deal on his speakers.

You're going to spend ~$3500 for the RF-7's new. I just feel for that price you can get a pair of a much better used Dali, Ac. Zen, or Zu