Dynamic range is important for HT, and since your room is large, you would benefit from a speaker with higher efficiency. No doubt these would improve dynamic range and coherency of your system. Matching center and rears are available.
http://hometheaterreview.com/zu-audio-omen-def-loudspeakers-reviewed/
Review is a good read with some very interesting comments, some about theater in general.
http://hometheaterreview.com/zu-audio-omen-def-loudspeakers-reviewed/
Review is a good read with some very interesting comments, some about theater in general.