Adding Home Theater To 2 Channel System


I have a two channel system that I am very happy with located in a dedicated listening room.  I am considering how to add home theater without giving up the two channel sound that I enjoy.  My main speakers are Avantgarde UNO’s (horn speakers - 18 ohm, 108 db sensitivity). Avantgarde does not make a center channel speaker.  I assume that I will have a problem matching any box speaker center channel speaker with the Avantgarde - my worry is incoherent sound.  Is this something I should worry about?  Are there center channel speakers that might be a good match (I have been unable to find any obvious candidates ohm/sensitivity match)?  Is it likely that I will need to find a new set of front speakers from the same brand as the center speaker?

The rest of my setup: Pass Labs XA 60.8, Audio Research Ref 6 preamp, SME 20/2 turntable, Lumin x1 streamer, Ayon CD player, REL 812/S subs (2)
chilli42
I am using a Classe Sigma processor  that I can put in digital bypass when playing 2 channel music with my Lumin T2 streamer. In bypass mode, the full analog signal bypasses all processing and the Classe acts as a good analog preamp.  Gives me the best of both worlds.
The topic was was discussed pretty well before. Build separate, independent system with own speakers for Home Theater. 
Yes, in a perfect world, 2 separate systems is the way to go. For some people, this is not always practical due to cost and/or space issues, I am a 2 channel guy, but love listening to my many Blu-ray concerts that sound much more spacious in 5.1
Perhaps think about getting an ARCAM AVR 850 and adding a center channel speaker and two rear surround speakers.  Whey you switch to two channel there is plenty of clean power as the first 50 watts are pure A.
I solved this problem by positioning TWO centre channel speakers next to the TV, between the main L and R speakers. Those two speakers were smaller versions of the L and R mains. Two more small speakers for surround speakers, and I had HT when I wanted it and two channel when I wanted that.

Those two smaller speakers above and below the TV is an even better solution if that can be made to work. I moved to that before I moved to separate dedicated HT and 2 channel rooms, and it's better. But a compromise is possible too.