I'd have to favor Nunn, but I give Pavlik a shot just because he'd insist on backing Nunn up and with his long jab would be able to get to him more than most of Nunn's opponents who were shorter than him.
I don't know about that. I think he would keep him guessing for a while, but Nunn might fade late (like he did against Barkley), and Pavlik might be able to turn up the heat and give him problems. At this point I'd still favor Nunn, but I'd like to see more from Pavlik too.