Resurrecting an old thread, but I thought anyone interested in seeing the results of a Jupiter-9 can have a look at the photo of a sculpture in my gallery. It passes the Fred Picker test of branches against a sky.
I've also shot some pictures at my brother's wedding with it last summer, and damn me, I couldn't find which ones I took with my Pentax lenses, and which ones I took with the J-9. I suppose that under untrying circumstances (soft light that day, very diffused), it's hard to be a bad lens.
I do like the perspective of the 85mm, it is indeed an ideal lens for making portraits while keeping a close distance to the subject. The 135mm doesn't give as much volume to the face, and sets you farther back from the subject. In fact, I found that the ideal distance for the 135mm was to photograph subjects in the middle of a street when you stand on a sidewalk. Call it a "Parade" focal.