I recommend the DTS Play-Fi ecosystem and you could connect all of your systems and run it with an app. I also have a Bluesound node but prefer the Play-Fi system because you have so many brands to choose from. You could start with a couple of Martin Logan Unison preamp/streamer by connecting one to your lexicon MC-12 and anther one to a bedroom systems’ They include ARC room correction and are on sale at 50% off:
https://www.martinlogan.com/en/category/wireless-systems
Playfi website: