These will be in a basement that is 12 x 25 with 7.5 ceillings. I will be running them from a Yamaha 6190b. The main use will be HT, and 2 channel audio will be the secondary use. I have an SVS sub, so bass should not be an issue. I know the m60 is 8ohm and the m80 is 4ohm. The 6190 supports both 8 and 4 ohm. Will I be losing anything other then a little bass by going with the m60 over the m80? Please recommend m60 0r m80. Price is not a big issue, but saving a few bucks never hurts. Thanks.