Chris Duhon would be perfect but the salaries don't match. Delonte West if he's healthy is an upgrade defensively and offensively. I think Mike Miller would be a nice addition although he's not much better defensively.
Anthony Johnson would've been a great PG to have now. He was pretty good offensively and defensively he wasn't perfect but he didn't get killed on screen and roll plays like Tinsley.
It'll be interesting to see how Dunleavy fits in and whether he can fit into a point-forward type of role.