I would LOVE having him on our team, and I think Rondo would as well. Some of you forget/don't know that Rondo and Smith are best buddies and that they played in the same high school team, so there wouldn't be any chemistry problems IMO.
But I would not trade Green and Baby for him. Baby had a bad second half of the season, but when he's playing like he knows best, he is worth more than Green or Smith.