A pair of M80s is as good as a pair of EP400's, IMO, and during my brief time with the Ep400 I found its sound became lost when the EP600 was playing. I am not sure if adjusting the crossover on the 600 would have helped the 400 become more pronounced by keeping the 600 out of the range the 400 would be playing, hmmmmm, interesting............

M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70