My only issue with the BMR as a center is the wide dispersion that the tweeter has. I don't feel like the sound is as focused relative to the Polk L400. I do think the Polk performs better with speech clarity in the treble as it's a little "sharper" and "clearer" while the BMR is a little "softer". When emailing Dennis he said his next project was to design a WMTW center channel.

If he makes it I'm buying it.
@ryanosaur Also, when the BMR towers arrive, I'm 98% sure I'm going to hold on to my L/R/C BMRs instead of selling them. They're just too good of speakers to let go of. Maybe I'll use them as surrounds or make a new 3.1-channel setup in the bedroom.