Wow! Thanks for all the great insights. It has me rethinking the entire idea of putting together a classic AM station for late night Hi-Fi Radio. My original idea was to recreate the "feel" of the station in which I took my Novice test back in '64. It was a 75A4 and a Globe King 500B. But that notion has since taken a turn to be more focused on audio quality than nostalgia (while still using classic rigs), hence my original question.
Seems I have lots to learn yet before I decide what to do. The suggestion that I go visit some collectors and listen to a number of different receivers is a good one. Any volunteers within a couple hundred mile radius of Charlotte, NC? Thanks again all! Theo K4MO