Yeah, that's why I was thinking the Sox should just suck it up at first defensively and play Ortiz there, and get a flexible DH (preferable an all-around OF kind of like Payton last year, but that can actually hit for the Sox, someone to take over when one of the three OF gets injured).
As for Casey, I'd like to have a guy like Casey at 1B...at half the salary and none of the prospect cost. I don't think any team would give anything above a couple decent but not projecting to be great prospects for a good but not great 1B making 7+ million and still aging.