I would think some of these players would make good sense for the Mavs:
http://www.nbadraft.net/players/patrick-mills
http://www.nbadraft.net/players/sam-young
http://www.nbadraft.net/players/jeff-teague
http://www.nbadraft.net/players/tyler-smith
http://www.nbadraft.net/players/eric-maynor
I really think Pat Mills will be a very good player. He has some nice international experience. Eric Maynor would be my ideal pick, I just don't think he will be there.
Sam Young would be an excellent choice if we move Howard. He is a similar type of player to Howard coming out. He is a physical player that really plays hard. He needs to refine his game a little bit, but he can finish at the hole and play tough defense.