I have both the FA28 and FA85 Soft lenses. They're interesting, but it sounds like you don't want to go that soft. But again, worth a try.
Just stay away from macro lenses - that's the main thing. I believe you'd find the aforementioned M (or A, in my case) 100/2.8 non-macro to be wonderful. At least I did!
And later if you want AF, the FA77 isn't that different in character from the M/A100/2.8 - just a faster aperture. You'd want to stay away from the sharper-looking DA70.
EDIT: I realize you said 50mm is too wide, but I suspect the K50/1.2 (rather than the "optically identical" but actually slightly sharper looking A50/1.2) is
exactly the kind of look you're seeking:
http://pentaxphotogallery.com/photos/gallery/query?camera=&lens=2190
The K50/1.2 fits in great with the A/M100/2.8 and K200/2.5 to give great looking photos which have a look of
~classical beauty. And I think a few others, including ones that may have been mentioned (e.g. K105/2.8) might fit in great as well, though I've only used the ones I'm specifically suggesting. Keep looking at photos - especially on the Pentax Photo Gallery, PBase, and pixel-peeper.com.
---------- Post added 01-15-15 at 04:34 PM ----------
You may even find you're happier when you mate these lenses with an older DSLR camera body (unless you want to go with film), like a K200D, K10D, or K-7. The sensors are different and the images come out a little different. For example, I think my K200/2.5 matches up best with my K200D's 10MP CCD sensor.