Best vintage receivers for FM?

For 2nd or even 3rd systems (inc. my workshop) I am thinking of buying an older receiver or two. Most of the listening time will be FM stations...and even in 2nd type of systems I do want good sonics....my FM listening has been on tuners like the MD-108 and Sansui TU-919.......so-so sound is not o.k.

What do you think of the following list of candidates, or can you suggest others?

1. Yamaha CR-1000 or CR-2020.
2. Sansui 9090 or G-9000.
3. Nakamichi SR-3a.
4. Sony STR-6800SD.

Thanks.....