I'm not really suggesting this(at least not yet), but our team w/o them doesn't look horrible:
Wilcox Melo
Sully Bass
JGreen KJoseph
AB CLee
Rondo Barbosa
Don't really know about Darko, or care about JCollins.
It's a team with plenty of the lineups we use routinely right now, and one, frankly whose record I don't think would be much worse than ours is presently. It's also, young, fast, and relatively athletic, and maintains plenty of trade chips should something come up that you wanted to jump on.
There are contending teams or pretending teams out there we could get some young talent/and or picks for, for these guys while they still have value and ability(though diminishing all the time).
Like I said, it's not something I'd do right now, especially in light of rumors about the C's acquiring a big man..(please Gortat and/or Varejao). If things keep going the way they are now, however, and we don't bring someone in, or at least get rid of Doc and his small ball, I would definitely consider doing it!