I don't know - that period when Zim was out, we unexpectedly hovered pretty close to .500. That wouldn't have happened without solid play from Hairston. I'm not sure we would have done quite so well with any of the guys you mentioned for such an extended period of time.
I'd be open to options other than Hairston, but I'm not sure I'd want Bixler or Lombo to start 50 games for us if something similar happens in 2012.