One thing's for sure, a FA OC is definitely cheaper than a FA OT.
I agree; it's one of the reasons I'm in favor of that, as it would be (relative to other spots, of course) cheap. Also frees up draft spots to OT/OG/DL.
And, as bad as the Bengal line is/was, it's not because of their OC. Their problem was more on the edges.
Not so sure about THAT, though...I thought that the Bengal O-line was much less of a force this year, and I'm not sure how much might have been due to Step.
Still, however good/bad he might be, I have no doubt he's better than Mahan. If the price is right, bring his ass in.