Depends on what focal length you need, which depends on what kind of subjects.
I have used both lenses on micro 4/3. Both are decent but nothing exciting. I wouldn't use either of them wide open for anything critical, especially for anything backlit or with bright highlights.
Try to get at least an SSC model, or better yet the twist-on mount for best coatings and better flare control.
"We paint with our brain, not with our hands" -- Michelangelo
Portrait, figure and fantasy photography at Silver Mirage Gallery:
|In the Big Girl Chair by BryanKing|
from Baby Photography
|Ruby Red Dress by cjf2|
from High key portrait with RED
|Follow me home by eaa|
from Shades of Blue in Nature