Dunn had an above average year in '04.
Davis had a pretty nice year, but could have done more in '04.
I would say that if the league was in the long term, you would easily win out with Davis. In the short term, it is close to even.
Houston's O-Line is very mediocre. Bordering on lousy.
Atlanta has a quality O-Line and many more options than Houston.
The real question is: "Will Vick share the ball with Dunn more this year?".
I would say that Davis is a better pick if he can make his own running lanes like he did last year; but, I don't think that you "robbed" the other owner.