Hey Ara,
You might want to check out The Rokkor Files
The chap who runs it has a rather extensive list of rokkor lenses tested...It may be of some help to you.
FWIW though, I use a 50mm f1.7 extensively with my X-700 and it gives great results...Both MC and MD mounts of this lens are really cheap, even from KEH.

Cheers,
Kent