In a pipe dream I'd love to see Bogaerts at SS, Cecchini at 3B, Middlebrooks at 1B and Ortiz at DH. Obviously I don't think that's going to work out like that.
The 1B free agent market isn't special. It has Napoli/Morneau/Reynolds/Pena/Youkilis/Overbay/Helton/Konerko/Kotchman/Loney/Morales/Morse. (Not sure if Corey Hart counts) Not sure what option is the best there. Morales, Reynolds, Lind (if his option is declined) and Loney would be the youngest options at 30. My gut choice would be Morales considering Lind is a platoon only option, Loney doesn't hit for power, and Reynolds would only compound the strikeout problem that we rip on Napoli (and Salty/Middlebrooks) for. I like Morales career splits better than the other options, but he's better vs. RHP. It depends on if we need a bat vs. lefties, or vs. righties. Overall at 1B I care more about having the best overall bat and I believe of the options listed that's Kendrys Morales.
I'm not the Bible on this stuff so I'm sure plenty of people disagree.