On number 1, I don't think so. We still to find out if JP's the guy.
On number 2, absolutley. If D-Brick is there at our pick we need to take him before we take Ngata. The offensive line is a little more of a priority than the defensive line in my opinion.
On number 3, Ngata seems like he's a natural run stuffer. I've heard he's getting a lot of comparisons to Vince Wolfork of the New England Patriots.