Do you have a sub? Most of those speakers are not made for Bass. The M80 can do a decent 40 or 50 Hz but not subwoofer frequencies. With most movie content there's a lot of low end in the center now a days. A VP160 would do a whole lot more than the 150.
If it's low end you seek with M80 you need at least the EP500. With my M80s I was using a smaller SVS sub. that they totally drowned out. I have been using a EP500 for the last couple years to which I highly recommend.