What dont you like about him hitting 6th? When he hits there this year, he has creamed the ball. Hitting 6th may mean fewer runs, but he seems comfortable there and hit the ball with power and production in that spot.
I like him a lot more than Sizemore. I think Coco has more pop than Grady, but really, the two of them are so close in value, it depends on where you need help at. If you need runs, choose Sizemore, if you need RBI's, choose Coco. As a side note, I think the rest of their categories will be a toss-up.