I'd do this trade in a heartbeat (though Atlanta would not)
Smith, Korver, Petro
for
Green, Bass, Lee, Melo, 2013 1st, 2015 1st, 2014 2nd (BOS), 2014 2nd (BRKN)
If they wanted Terry instead of Bass or Lee or if they wanted to keep Petro or Korver, I'd do that as well.
And I would do that trade and be ok with it even if Smith bolted this summer because at least then it clears Boston out of the financial mess it is in (though I would like to keep Smith).
I would consider Bradley or Sullinger in the trade, but would definitely need to talk to Smith to do that, as I would want him to re-sign if I was giving up one of those two.