I agree with others that the new PI rule should not effect Newwman's game very much. He primarily used speed, quickness and technique to stay with WRs like glue while rarely using physical contact beyond the 5-yard bump zone. The last step he needs to take to become truly dominant is to have the confidence that any ball in the air belongs to him - that it is not good enough just to prevent the catch. He showed these skills in college, he just now needs to have the confidence to do it at this level.
We have not gotten to see much of Hunter at CB. He played in the last couple of games in the 2002 season. From what I recall, he really played the ball well. Actually, he played the ball much better than Newman. I'm really intrigued by his potential and I think Zimmer and Parcells are, too.