I really get the feeling Okung, Bulaga and Williams will be gone when we pick. For me, Haden is the only exciting choice at 13. But I think he too will probably be gone. My hope is that Spiller is still around, not so we can draft him, but so that we can trade down with a club who fears the Seahawks or Giants will want him behind us.
For me, ideally, if the key tackles and Haden are gone, we would use 17 on Maurkice Pouncey and trade down 13 for a late first rounder, which we could use on Patrick Robinson. We could then aim for Ducasse or Veldeer in the second, and use the additional pick (I'm assuming a high second-rounder) on a returner/change of pace back like Best (if the pick is high enough) or McCluster (if it's not).
My thinking is this: Heitmann isn't getting any younger, and the line calls didn't seem to be working last year. So we draft the most bust-proof, intelligent player, who can also play guard (in case Baas is gone after next year). In any case, we get a great player. Then we pick up a great cover corner with the size the Niners covet, and speed to boot. We get a solid RIGHT tackle prospect, and we pick up someone to help our return game and change of pace in the running game. Later rounds can be used to address inside linebacker, kicker, safety, fullback, and maybe another returner and/or corner prospect.
Shoot me down!