I agree completely 984....Not one of us can sit here and say we know for sure D-Bo can play the run, we can forecast and predict all we want, but we really have no idea.
With Coleman, we know we are getting a guy that can hold the point of attack, contain his side, and even add in 6-7 sacks in the base defense. That is better than what we have had in the last few years.
Coleman might not start, but he would be our BEST(most complete) backup and could be rotated in for DG without us losing much, maybe even gaining more if DG doesn't pan out.
Bowens will probobly get a chance sometime this year to show whether or not he can hold up against the run, or for that matter, prove if he can actually get after the QB for a full 16 games. We haven't seen much of him yet, which is either a good thing, or a bad thing(hiding his deffiecencies).
I think if we sign Coleman, we are set on the Dline.