@cheeg,
Ive always heard such good things about the older McCormack DNA amps, as you described above.
The OP specified some higher end amps from 20 years prior, but I will say that right now I am listening to a Luxman R-113 35w SS receiver built 25 years ago in 1993, driving a pair of Zu Audio Omen bookshelves, 16 0hm.
Sounds great!
I mean, the Luxman only cost me $65 at the local record store, but it is similar to Naim to my ear, but a bit more even keel (less PRAT-ish).
oh, and what about Naim amps/integrated? they have a cult following going back to the 70's, and still traded heavily on the used market, but may need recapping.