Who hits 3rd?

There seems to be lots of angst with the M and M boys right now. Flipping Morneau and Willingham in the order to create matchup issues later in games seems simple enough, even though Gardy won't do it. So, who should bat third in this lineup? If not Mauer, then who? If Mauer, then give your reasons. And remember, professional sports is all about "what have you done for me lately?"

My pick? Span

My batting order right now would be Carroll, Mauer, Span, Willingham, Morneau, Doumit, Parmelee, Valencia, Casilla

Mauer, Span, and Morneau are the best overall hitters. Willingham and X (hopefully Valencia) are in the second tier. The best overall should bat 1,2 and 4 with the speedy obp guy 1 and the slugger 4. A slugger should also bat third. So I would go Span, Mauer, Willingham, Morneau, Valencia, Doumit . . .