I think realistically Ainge would only go after players he has vied for in the past.
Smith, Pierce, Garnett, Allen, Perkins, TA, etc.
The difference is that clearly CBS has a brand of players he wants to coach, multidimensional players that can guard outside of their positions, switch on help defense, shoot, pass, and are overall intelligent basketball IQ type of guys.
Unfortunately Josh Smith doesn't fit the mold, but you would be a fool to turn him down.