Would none of you hear any arguments for Tulowitzki, given how shallow shortstop is? He's still incredibly young, gives you power at a position where it's the most premium, and his offensive numbers will never disappoint when he plays all year in Coors. His play this 2nd half has been incredible, and if he can just have an average start to next season instead of an utterly abysmal one, I think the argument between him and Upton is much, much closer than anyone else has said.
That being said, Miggy and Kinsler are indeed surefire keepers. I think given the breadth of outfielders available who produce year in and year out, I'd again, just consider Tulo, and perhaps Greinke. I may just be too high on middle infield scarcity. Good luck, I certainly wish my 12 teamer had your difficulty