I think Bynum's tough, he's just dumb sometimes. He's probably a better player than Perk right now, mostly because of his offensive game, but I'd rather have Perk, with his much better contract and greater consistency, at this point. Much of that is because I worry, as RAcker points out, about whether Bynum can last a full season (though Perk's recurrent shoulder injuries shouldn't be dismissed out of hand). But the fact is, Bynum is doing a similar defensive job on Howard to what Perk did and gives you a better offensive threat to keep Howard from swallowing up all penetration by other players. The consistency thing hasn't been proven yet, though. I still don't think Bynum can keep up that defense for a full series, though LA may only need 5 games instead of 7.