If you believe the active roster must fit to a certain form, then the perimeter rotation would look like...
Starters
1 Parker
2 Ginobili
3 Bowen
Bench
1 NVE
2 Barry
2 Brown or Finley
3 GRob or Barnes
That gives you a pure point backup and 3 swings on the bench. Pretty much the standard NBA format.
Of course, there is nothing that says you must have a prototypical rotation. I'd be surprised if they landed Finley but hey, they just got NVE.
If they got Finley and retained GRob the Spurs would have one of an experienced, versatile, and nasty bench.