Without dorsey or ellis on board..
The only player I would trade up for would be Dorsey. If Dorsey, Ellis, or Rivers are gone at 10, I would look for a trade down but stay in the first round and then get whatever best DB is still available. I do not think any of the DBs merit a top 10 pick. If no trade down is available that looks reasonable, I would pick BPA which would likely be OT at that point.