I am not surprised by your findings. I had thought the VP160 wouldn't pair all that well with the original M80Ti's based on what Allan has mentioned here and there about them and a little speculation from myself about how the M80Ti's might sound based on my M22Ti's. I am betting you will like the M60's, probably even more than the M80's.

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