Dampier is horrible, I can't believe someone even mentioned him.
The C's HAD to get a center because PERK is out for over half the season. There may be other players at other positions who are better but that's not what this team needed and those responses can't be viewed as realistic.
There's a pretty large pool of centers who aren't very talented; they just have NBA jobs because they are 6-11 or taller and in reasonable shape. Sheldon Williams fits that bill. He's not good enough to be on a title team which is why he wasn't even considered an option. I guess what I'm trying to say is the C's were after a good/decent center, not just a warm body so they could spend money on other positions where they already have talent.
Doc and the organization don't even trust Semih; he's only here because we have no other choice if our other guys are unable to play.
I think JO was the right choice, but unfortunately it hasn't worked out due to injury; not due to the fact that he is healthy and isn't performing.