I have the Sigma 85mm f/1.4 and I've been quite please with it for portraits. I generally don't shoot action so manual focus is not an issue for me. I also have other MF lenses.
Aaaand yesterday I tested out the Zeiss 135mm f/2 APO - the results are stunning. I'm talking about color rendition, sharpness and lack of CA.
The bad thing is that I didn't have the Sigma with me to test it side by side, I only had my 35mm Zeiss and of course it didn't help.
I would be very grateful if someone who shot with both lenses could give me some advice - should I sell the Sigma and get the Zeiss?