...I'm not entirely sure how you would hit 120db peaks at seating position with 50 watts. The Forte III are 99db. To hit 120 at 1 meter you would need 128 watts...64 if we say both speakers playing the same thing which gives about 3db increase. If we say you're about 9 feet back, that would be around 9db reduction, meaning you'd need around 500 watts to hit 120 at the seating position. In a room that big I can't imagine a huge amount of room gain except at the lowest frequencies but perhaps I'm thinking about this all wrong...