Rudy Gay is still better,even though he costs alot more but i found this interesting(taken from RGM)
Rudy Gay (age 26): 18.2ppg (16.6 shot attempts), 5.9rpg, 2.6apg, 0.8bpg, 1.5spg, 2.5topg, 41.8% FG, 32.5% 3PT, 80.8% FT
DeMar DeRozan (age 23): 18.1ppg (15.4 shot attempts), 4.9rpg, 1.9apg, 0.4bpg, 1.2spg, 1.7topg, 44.0% FG, 30.8% 3PT, 81.9% FT
Granger is still acquirable and when healthy,he may be a better fit than Gay with his ability to shoot the 3.
Calderon+Kleiza for Granger
Approved On NBA Trade Machine - ESPN
For Indiana,Calderon is a low post big friendly PG who's an upgrade over Augustine and Hill(who can also play SG)