I heard a pair of Kefs years ago vs. our M60s. But that was well over 12 years back. I don't recall alot about it.
Coincidentally i just found out my neighbor has a vintage pair of Kefs (not sure exactly how old) but if i have the chance to get over to his place, i'll take a listen with my test cd.

"Those who preach the myths of audio are ignorant of truth."