The one thing the talking heads have all forgotten to mention is that Mario Williams will likely play 8-12 years. He will likely make the pro bowl at least 5 times. Reggie Bush is a running back, the average career span for a running back is less than 4 years. Bush is undersized. Will he be able to play effective 20-25 touches a game. However, it is likely he will be done by age 30. His advantage is speed. You lose speed with age. Mario has great speed too, but 10 years from now when some of that has gone away he will still be a power 320lb defensive end.