In a room that small the VP100 is probably sufficient, it does fine if you're not more than about 12' from it. Of course if it is for movies only you may want to splurge on the 150 as so much of a movies content comes through the center. You can always try the 100 and trade it on a 150 within 30 days if you so decide. Even if you buy the 100 and move to a larger room later, Axioms trade-in program is very good, they usually give you top dollar for the old speaker(s).