Dwight for overall impact and potential, Al Jefferson for inside scoring, Ben Gordon for outside scoring (over Kevin Martin), Emeka Okafor for defense, Luol deng for consistency and AI2 for versatility/ all around game.
On secound thought, I am about to switch my vote between Gordon and Howard. Howard is the better player. Ben Gordon reminds me Allen Iverson, a good scorer, but can't seem to have a good field goal percentage, (Career high for Ben Gordon, 45 percent). A good scorer at 6"3.
Now on to Deng, he is a great player but one day will enter his prime as the Bull's team leader. Consistent player he is.
On to Howard. Damn this guy is awesome. His rebounding, post up scoring, and blocks is something the Magic haven't seen in a long time. Probably the first great center since Shaq. Possibley in his prime time.