Payton is the obvious choice, but I think he reminds some people a little too much of Rondo. While the majority of the board appreciates what Rondo brought to our team, it seems a lot of us were ready to move on to another 'type' of PG.
Still, I would go with Payton (and possibly Saric) over Smart and Capela / Hood / Clarkson over Young. Looking back, Ainge did a good job in that draft and I am happy having a hard-nosed player like Smart on the team.