Desperately need 1B - Who Should I target?

Currently Chris Davis is my 1B. Yeah. Ouch. So I need a better first baseman. My team picture can be found here: http://imgur.com/a/ih0OU. Who should I try to target. I was thinking about Allen Craig or someone like that. Who should I put up for offer? The only notable free agent in my league is Middlebrooks, so I would be willing to give up Zimmerman (or maybe even Beltre) possibly to get someone a little pricier.

12 team roto league. Thanks in advance.

EDIT: That is my team photo minus Tillman, who is getting picked up as Joyce moves to the DL slot. Hoping to be able to shop him around a bit.