Synergistic Research HFT's

Not to open up a can of worms but I am reaching out to people who actually have tried the SR HFT's or Black Box.  I am building a new house and my two channel room is my great room / kitchen.  The dimensions are 20'W x 40'L with 16' cathedral ceilings.  This is not the best 2 channel room but it worked well in my last house.  So the question I have are there any tweaks that I should be considering to improve the overall sound performance?   I know the obvious answer is Acoustical Panels but that won't fly in my house.  I already have all of the Perfect Path Technologies products for my system.  I already have SR Blue Duplex's but might change to the orange.  So now I am looking at what I can do to improve the sound in that kind of room without Acoustical panels.  The rest of my system includes:  Canary Audio Grand Reference 2 mono amps, C1800 Pre-Amp, InaKustic 3500P Conditioner, Lumin X-1 Dac/Streamer.  My cables are all upgrades also.  I have been looking at the SR HFT's and Black Box.  Comments?