Sorry, bad writing on my part. My suggestion about the 50s was related to a comment along the lines of preferring a slightly more rolled off highs (guessing that's actually upper midrange).

The way I wrote it sort of implied that the 50s comment was related to the previous sentence about imaging. Not my intention, O enforcer for the M50 posse

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8