I have a very similar room with concrete floors powered by McIntosh and I just don't know if you can get by without subs if you don't have horns no matter how much you spend.
Magico A5, Wilson SabrinaX, or PS Audio FR30?
Powered by a McIntosh MA12000 in a 14’ (width) x 30’ (depth) x 10.5’ (height) room with concrete floors. Listening is 50% jazz, 10% classical, 25% rock/alt, 15% electronic. Sources are a Dr. Feickert Blackbird/Soundsmith Hyperion analog and Innuos Statement digital. Ideally, I'd like to eliminate the need for dual subwoofers.