Any T.A.D. speaker I have heard I have enjoyed, like Joseph Audio, Sonus, etc.
Years ago I dialed in a pair of used D2's into my 21' wide x 17' deep by 8'-12' l-r, side sloped ceiling, room (with two large openings side and rear). They are not concert machines but the will go down near flat to 31Hz and with power and speed.
These are my last speakers (I truly think). They creamed my Dynaudio Sapphires and I'd been pleased. I do use a DSPeaker Anti-mode unit to tame the room a bit and the Raidho bass blump I and others notice. A flat frequency response from those speakers makes recorded music sound stunning at any level (up to so high).
The Borreson's I've heard were fabulous but I might actually prefer Michael's D-series. I don't play concerts at home (thanks for the tweeter tip, blisshifi!) and the little woofers give in first if I get too excited (although I am less sure of that as I have changed amps to an Odyssey Kismet-amazingly audible positive changes including deeper stronger bass).