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 .