I'm running these with a THX-365C and I love the way they sound. Insane value to performance ratio.
I thought I got a good deal (UK) when I bought a bunch of Monolith gear as Monoprice pulled out of Europe.
2x M-15 v2 subs at $740 each
2x T6 at $220 each
2x B6 at $104 each
Then I saw that, I'm guessing briefly, the T6 were down to $169 each on the Monoprice site. Although now out of stock and no ETA.
I've run them without centre but with the 2 subs crossed at 80Hz with EQ management using Dirac on a 2.1 channel amp and you really wouldn't know you were running a phantom centre.
I'm currently transitioning to a 5.2.2 set up using the B6 as surrounds with Arendal 1961 heights with a Denon AVR. Although I can see myself shelling out for the Dirac licence because of how well that works in my room.
And personally, while these towers do dig deep for music, with films and other LFE content you need subs. But then I like my bass