I also have a large room, and my solution was to triamp with an SS amplifier for the 2 subs (LP @ 48hz 24db/oct) Magneplanar MG 20 bass panels on another SS amp (LP @ 220 Hz 6db/oct, no HP filter), and a third amp (Tube) serving the Midrange/tweeters (HP @ 290 Hz 6db/oct, no LP filter). The crossovers are Pass Labs XVR1s. This stereo is way out there for a system, but it really sings! I have made incremental changes, one at a time! to arrive at its present incarnation.
You really need to experiment with the speaker locations to get the best compromise between imaging and bass response. I am pretty sure you will need to have a stereo pair of subs to get the bass right for audio and audio imaging. Two subs will allow more flexibility in the room setup, and some of them are pretty small, which will help the "cosmetics" of the room. (WAF). I have read good things about JL Audio and SVS for subs. JL Audio has a couple of in wall subs that can be completely unobtrusive.
Good luck, this sounds like a really cool project!
You really need to experiment with the speaker locations to get the best compromise between imaging and bass response. I am pretty sure you will need to have a stereo pair of subs to get the bass right for audio and audio imaging. Two subs will allow more flexibility in the room setup, and some of them are pretty small, which will help the "cosmetics" of the room. (WAF). I have read good things about JL Audio and SVS for subs. JL Audio has a couple of in wall subs that can be completely unobtrusive.
Good luck, this sounds like a really cool project!