I will be building five AR.com speakers from madisound in the next few weeks for 50/50 Music/HT use. I was a little curious how well these speakers work as a center channel speaker. Would going with another speaker with a MTM design be a better choice? My room is far from ideal at about 12x14, with two open walls. It's kind of hard to picture, but it is the best I can do in my small apartment.

I have decided to build a sonotube sub after reading a lot about them online. Would a sealed sonotube with either a 15" Quatro or 15" Atlas be a bad match for the AR.com speakers? Also, as I don't want to install a plate amp on the tube, could someone recommend an inexpensive external amp that would be well matched for these drivers. Any other recommendations are also welcome. Thanks.

Dustin