Same size room, same Hegel 360....speakers ATC SCM19. Disclosure, I'm an ATC dealer in Canada, but maybe someone near you in Texas carries them. Sounds like the perfect solution for you. Being sealed, it is way more room friendly in this smaller room than most speakers. I should know as my room is 11.5 X 14.5 X 8, so almost identical. I think some of the other options you mention will excite the room modes from 40-50Hz more. The ATC SCM19 has some rolloff at these frequencies, so it works quite well. But, the rolloff is gradual, so you still get some bass response from them in this size room down to 30Hz. I've had trouble with a lot of speakers working well in this room and this has probably worked out the best for me over the years. I'm now also augmenting with the matching ATC sub, but the SCM19's work great on their own.
You can check out the full system here if you like:
http://www.everestaudio.com/products/System-1-Hegel-and-ATC-ssi.htm
You can check out the full system here if you like:
http://www.everestaudio.com/products/System-1-Hegel-and-ATC-ssi.htm