Maybe the Outlaw sub is worth a try. I love my system the way it is for music as the music I like (rock, blues, jazz) is material above 35-40hz. I want the sub to pick up the very bottom with the movies. If I get the sub I will start it crossed over at it's lowest setting to see how it blends.
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Outlaw 990
Outlaw 7500
Panansonic DMP-BD55
Marantz CC4300
Sony TA-N55ES (zone 2)
Definitive Tech. BP2002
Definitive Tech. CLR 2002
Definitive Tech. BPX
SVS PC13 Ultra