It has been some time, but I recall another member stating that the RS6's did not provide the same bass quality or soundstage of the m60's, and they sounded a little thin. Your right if you've heard m80's the 60's are similar in sound. Can't help you on the RS6's.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85