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If you are going to rely on the room the way it is, get a speaker with a wave guide for the dispersion is controlled. The results will be superior. The Aida is recommended to be at least 6 feet from the front and side walls to fully use their "depth" gimmick. Sorry I meant control.

The Macintosh amps are perfect for bi-amping but what if I bought the Macintosh 900 then also used my BHK monos for tri-amping the Sonus Faber Aida

It would NOT be what you say you want...matched. I have no idea how you fit BHK into a matched system, no BHK speakers. Your professional instincts KNOWS what you should do. You are entering play time after years of focused listening. I would stick with what you know works for BIG purchases and then play with tweaks like power and cables.

Remember to audition those flagship Meridians in addition to whatever else you audition. 

@kota1 ill try the Meridians but I think Speaker guy is right, even if Macintosh owns Sonus Fabre I don’t think these units are made for each other. One reason is because the Mac 900 is basically 2 amps welded together it weights like 180 pounds it’s a tube amp and transistor amp worked together, what’s smart is tubes for mids and treble for bass, What I’m not really buying is this simply a gimmick could I buy 4 amps separately and do better or did Macintosh build this amp as a more synergistic low / mid treble frequencies, impedance, load, timing issues in mind. And of course the main thing the crossovers are in the speakers, this amp is not made for the speaker if it was the crossovers would be outboard and line level.

@thespeakerdude i do have enough room for 6 feet around the speakers, I wanted to ask you what you thought about the depth gimmick, I love the physics and the sound of rear facing speakers and this design seems smart just a bit of mid and high frequency. With the design of the Aida the rear facing drivers don’t have a very big wave maybe 2 feet at most (500hz) not long enough to contaminate the front waves. Hearing the sound bounce off the back wall is key to creating a real sound source, Omni speakers have that quality.

Also Kota so well said this is playtime after 35 years of being totally focused on the most minute details of sound and now I want an amusement park of enjoyable listening.

even if Macintosh owns Sonus Fabre I don’t think these units are made for each other. 

I see those Mac amps in the video, giant mono blocks, huge amounts of power. Of course it makes you want that amp, who wouldn't. You got bit by the Sonos Fabers, wonderful. I think that is a wonderful combo for anyone wanting a two channel setup.

But, it isn't active, it isn't inexpensive, and not really matched like Mac speakers would be. For an end game speaker I would have to have the amp, the crossover, the drivers (ideally individually powered in an active setup), and the room all match. If you want to use your BHK both th M2 and the Bryston active use outboard crossovers, NP.