Other O-Line options in round 1

[JWW1971]

As I've mentioned before I don't get to see a lot of College games over here so I don't know a lot of guys going into the draft and only really hear about other prospect from reports and on here.

I listened to the Bengals booth podcast where guest Pete Prisco mentions that Darrishaw is the real deal, is there any chance we pass on Sewell if he is there and trade back a few spots for an extra pick somewhere and take Darrishaw?
Also I read that both Sewell and the other top tackle Slater sat out this season. Would this effect there draft positions and possibly see them falling in the draft.
Also is Wyatt Davis as good as some reports state and could he fall to the 2nd round where we could get him there