Recommendations for Vintage Speakers

A buddy of mine runs a pair of late 70's KEF Calinda loudspeakers being driven by a Marantz 8B power amp.  This is absolutely magical. 

More than any other loudspeaker I've heard. the Calinda is very revealing of the sonic character of your amp.   Were I to get into a pair of them (figure $500/pair or less), I'd get a VTA ST-70 to drive them.   It's at least as good as a Marantz 8B and a whole lot cheaper.  Available either pre-built or in kit form.

Dahlquist DQ 20’s. IMO better than the 10’s
Just sold mine.  Almost sorry I did.

AR3a's with micro acoustic tweeters    circa 1972

From your listening tastes, it appears you want a combination of "Punch" and delicacy.  RnR bass, with clean extended treble.   Not an easy accomplishment using vintage speakers.

A budget was not mentioned.

I would recommend:

Larger floorstanding ADS
JBL L110, L112. L150, L220, L300
Polk 10B
AR 11, AR12, AR91, AR92, AR58s ("s" has a dome midrange, other versions do not).   I would stay away from AR3/3/5 series as you will likely burn out the tweeter when listening at realistic levels.

Altec VOT or derivative (if you have the space)

   Hi , my .02 . Hi currently have Klipsch Heresy II’s and JBL 4312a’s . Both are between Lousy and Mediocre. I bought them on a Vintage kick , like you’re doing . The Jbl ‘s Sound pretty decent with about a hundred tube watts per Chanel . One member suggest the Klipsch KLF’s , nice speakers if you brace the cabinets and improve the crossovers . A pair of Tannoys would be fabulous, but expensive. My suggestion would be Bob Crites Cornscalla’s . Large ported cabinet , 15” woofer , and a retro design with a makeover. You could have them in a dark walnut stain with dark blue grill covers . Or do them in a light maple with tan retro tweed cloth grills , or no grills . They would match up well with your amp . BTW , I tried a Sansui 7070, 9090, and a Modwright KWI 200 with both the Heresy’s and the JBL ‘s . My little Klipsch KG 1.5’a sounded sweeter than both ! I recently gave my Marantz 2223 and the KG’s along with a Schiit Bifrost to my son . And the Sansui 7070 and the Heresy’s go  to my daughter next month for her new condo . They’re happy , I’m happy . Now I just need to part with the 4312’s and the 26” Sound Anchor stands I had built . Cheers , Mike .