Full range speaker recommendation

The best stand mount speakers I have heard are Wilson Audio Duette. You get incredible sound with these. If you combine these with subwoofers.... I can't imagine the sound. Interestingly there is a listing on Audiogon for a used pair.

Other than that, my vote goes to Tekton Pendragon or Double Impact SE or Vandersteen 2CE Sig III with your subwoofers. I have the Double Impact SE and they are very dynamic speakers with LOTS of bass and punch. My Vandersteen speakers are the 2CE Sig II and paired with subs are very refined, less in your face.

If new, Spendor Classic 2/3.  If you look for gently used, you could step up to the Spendor Classic 1/2.

The Focal Aria posters are a waste - what a joke. Higher end Focal - sure. 

I can't recommend the Sonus Faber Sonetto VIII enough - with the subs you will fill in the very lowest the towers don't but they have EXCELLENT bass extension and super clear mid and upper ranges.

I had Maggie 1.7 and now 3.7i with dual subs in a 12 x 15 room and they sound fantastic

Following johnto’s comment and responding to an earlier poster, there is absolutely no reason why a pair of Magnepans will not work in that room.

Separately, (Saul Cohen), it’s not that the Watt/Puppies are difficult to place, but they require very patient and accurate setup. However, you could still find them a mite unforgiving tonally.