Good post, Falstaff.
The Bills will probably only keep 4 DE's, maybe 5. But what I've noticed in recent years is the Bills like to keep 4 DE's and 4 DT's, and then keep an additional 5th guy that can swing back and forth from both positions if injuries occur. That player has been Jason Jefferson.
I don't see the Bills cutting Schobel, Kelsay, Denney or Ellis, so that mean's if we grabbed McDougal or Smith they'd have to be on the team as our 5th defensive end. To carry a 5th defensive end that doesn't also play defensive tackle or special teams is a complete waste, especially since we need all the roster spots we can get with the injuries.
I've seen a lot of Tony Hunt and I never understood what people saw in him. I watched him a lot at Penn State, but he just didn't do anything for me.