Given the size of your room, I would go with
http://www.hsuresearch.com/products/vtf-2-mk3.html
or even the VTF-3 (if you need more power and a rosenut finish)
http://www.hsuresearch.com/products/vtf-3-mk3.html
These units give you bass extension mode, so you could either go with lower frequency response (down to 18 Hz) or maximum output. Good luck
http://www.hsuresearch.com/products/vtf-2-mk3.html
or even the VTF-3 (if you need more power and a rosenut finish)
http://www.hsuresearch.com/products/vtf-3-mk3.html
These units give you bass extension mode, so you could either go with lower frequency response (down to 18 Hz) or maximum output. Good luck
