My office is just 12 X 15 feet, 8-foot high ceiling and carpeted floor. If I were in your shoes I would go with
Logitech 2.1 and the price is great. You could even do some small nite club and restaurant jobs with it as well as nursing home jobs. 200-watts RMS power with lots of bottom end and punch.
Good luck,
Gary

Edited by travlin'easy (03/11/17 12:38 PM)
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)