Decker, he's shown so much pure ability in his position. We've had a terrible line and he's had some lame ducks lobbed his way on a pretty consistent basis over his career, yet he still reels in catch after catch, even in double coverage.
I love MBIII, but Decker's success is so much more dependant on a group of guys protecting the qb long enough so a play can develop, and even at that, the qb has to throw a catchable ball. Rb requires holes being made by the line and a successful handoff. That's it.