Bret would be my first choice and there isn't a close second.
By and large Ferentz's style fits what Iowa can realistically do in recruiting year in and year out...good lines...build it from there, and it's going to favor balance, strong running and play action passing. Skill positions are never going to be Iowa's strength...it's never been that way and I dont think it ever will. But if you can run it regularly, you should get your share of good RB prospects...and Bret can build that...and he is also more engaged in recruiting and seems to relate better with kids..and he'll expect his staff to be tireless and the same way as it relates to recruiting, not something that has been the case at Iowa IMO.
I don't think just anyone can come in to the Iowa job and make it click...you have to understand what you are getting into...there are real challenges that can't be wished away...but the program also has some strengths others don't have.
Bret played there...he coached there...he knows and he could have the ultimate sales pitch to recruits.
Count me on the BB bandwagon.