The 135mm f/2 is the best bang for the buck, by far. It's a telephoto, but not too long. It's DOF is as shallow as you'll probably need. It's relatively light and short compared to comparable lenses in that range. And it focuses MUCH quicker than the 85 f/1.2.
Compared to the 135mm, the 85mm f/1.2 simply allows you to be a little closer to your subject. So I would make your distance from subject (and desired crop) the deciding factor.