You are right, of course, but if JP turns into a probowler (even if he isn't as good as Ben) getting two top players in my mind is better than just getting Ben. But, at the moment that is just speculation since Lee is a rook and JP hasn't been healthy.
I can't remember what the price was to move up. I just remember reading (maybe in Bills Digest?) about TD trying to move ahead of Pitt and calling every team. Of course he didn't say who he was after, but logic says it was Ben. I most teams wanted three first round picks (last years, this years and the year after) or something crazy like that.