Thanks for your thoughts on the differences Jritz. The discussions make sense and helps explain why I like the M80s more: I'm definitely plopped at MLP for the duration of listening, am not using a a sub, and did not spend much time mucking with placement (because I didn't have a lot of options anyway; although I did futz with wall separation and the DSP wall boundary button a bit).
I have M5s in two other rooms, both with a sub and I think the M80s are more precise; but that may be due to the M80s being in a more open room (both subs are Hsu, so at least not bad).
All-in-all, it's good to have options!
