Advice Needed On Vintage Yamaha SpeakersH

Hi all, I have complied a vintage Yamaha system that takes me back to my formative audio years of the 1970’s. It consists of the Integrated CA 810 and matching tuner. A TC 520 Cassette Deck and a YP B4 (B) turntable. I might add a CDC 685 multi disc player to the mix. I’m looking at a pair of NS 20T or NS 500. The NS 500’s have been re foamed and are somewhat local. I can drive to get them. The first pair would be about 50 to ship. Both appear to be in great shape cosmetically as well. I know which are the better speakers but this system is a nostalgic luxury of sorts and will not be actually played all that often. The 500’s are over twice as much. I'm also in the midst of upgrading my main system. I await all responses and thanks in advance. Good sound is important, sparsely played or not.