right now I'd rate the OTs like this
tier 1. Okung (consensus #1)
tier 2. Bulaga (most ready to start, less upside?), Davis (best run blocker, weight problems?), Campbell (most athletic, least experienced)
tier 3. Charles Brown (moving up), Trent Williams( formally in tier 2, then downgrade but now seems to be moving up again), Iupati (if rated as a OT)
tier 4. Vladimir Ducasse (formerly a 2nd-3rd rounder now an end of 1st middle of 2nd guy)
OTs of interest - Jared Veldheer 6,8 325 425lbs power clean 4.9 40 small school low level competition.
Ciron Black- formerly rated as a top 25 player now downgraded to 3rd -4th round due to athletic concerns made 53 starts at OLT for LSU (just as I'm skeptical of a guy shooting up the boards I wonder about the guy who suddenly falls - football people seem to have a heard mentality)