The Bengals, Jags, Packers and Rams could all use good linemen. Almost everyone in the top 15 could use a great defensive lineman as well and there are a couple great guys on the top of the draft. Niners could trade up for a QB, as could the Seahawks potentially, especially since all of these guys aren't year 1 or year 2 starters. They will more likely want one of the top WR's, and so will the Jags and Raiders. There are always possibilities. Look at what Jacksonville did last year.
Out of the top 10, only the Lions and Niners really have true needs at QB. That leaves 8 spots they could move and still grab Sanchez or Stafford. Unless of course someone else trades up after they trade down. And if that happens, oh well. Are they going to be any good this year anyway? No. And now maybe they can get a superior QB in McCoy or Bradford.