The Super-Takumar 35mm 2.0 (the later version) is a truly great lens. For longer lenser, you might look for the Jupiter-9 85mm 2.0 and perhaps Fujinon-T 100mm 2.8. I have been quite pleased with these myself.

The Super/SMC-Takumar 85mm is very expensive, but a Jupiter-9 in good shape can be just as useful.

Trond