Thank you for your responses. I feel that my question is rather useless in a sense. It's easiest (but not always financially feasible) for me to just own and both lenses and sell the one that doesn't really work. (Although I feel that I wouldn't sell either!).
How about a Summitar? Wonderful wonderful lens.
"Often moments come looking for us". - Robert Frank
"Make good art!" - Neil Gaiman
"...the heart and mind are the true lens of the camera". - Yousuf Karsh