With my freshly purchased BMR, courtesy of an acquaintance from that other forum... I am going to experiment with a rear center. This has been something I've been wanting to play with for a little but because I do have several DTS5.1 CDs that utilize the Rear Center. Though the signal is parsed to my Rear Surrounds as is, I know the Marantz supports that Rear Center and if it works out I can utilize those existing Wall mounted Surrounds as Rear Height, and add Front Height later when I get caught up on my Speaker builds.
Just a grand experiment to see for myself.
The BMR is also one of the older cabinets with the curved sides, larger internal volume, and presumably DM hand-built XOs instead of the manufactured ones in my existing BMRs... I will get to see his original design work first hand!
Considering I'm learning Speaker Design... this is a win-win for me.
Cheers!