I think the 150 would be a fine match, especially in that room, it is more for dialog in movies. I owned one for many years with my m60's and leter m80's, in my bigger room, it it was fine.
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M80s-VP180-4xM22ow-4xM3ic-EP600-2xEP350
Anthem AVM60 Outlaw 7700 Emotiva A500 Epson 5040UB