Help recommend a ~50mm lens, AF not important

After I posted, I went back and reread your original post, and one of your objectives was low coma. I love my Contax 28mm, but I have to say that it does show significant coma when the conditions are right. I have never seen coma in my 50/1.7.

EDIT:
Out of curiosity, I took my 50/1.7 out to check for coma, and it has it. I must have just never used it in conditions where it made it apparent.

The 50mm F 1.7 C/Y Zeiss mentioned is as good (if not better) than anything, and since you mentioned landscapes, stop it down to F 5.6 and it will give super results. Here is a "landscape" I did with it several years ago:

IMAGE LINK: http://anscochrome.zen​folio.com/p137906096/e​4e78e95a

Why not the 50 canon macro? Do you need the exta dof? I have never used the 50 macro, but then I don't use 50's for corner sharpness either. Other general idea with this option is it fills 3 gaps...macro, wide portrait, and solid sharpness w/ auto focus when warranted.

Oh and it's fairly cheap as far as ff lenses go.