As someone I recently purchased an Epic 60/500 set, I have to agree with that the 60s are mindblowingly beautiful. I went with them because my room is not large, I didn't want to deal with the lower impedance and the assurance from Alan that blind testing had revealed that the tonal differences between the 60s and the 80s were not extreme but were in fact almost subtle.
There was a lot of talk in the forum about the 60s being "laid back" but Alan assured me this was not the case. I now know that they absolutely rock. As I have said before, Whatever reality is in a recording, these guys will reveal it.
Anyway, 4 years of M60 ownership is time very well spent from an audio perspective IMHO.
Congratulations!
