Just the fact that we're having a discussion about this shows how far Perk has come. And if I look at the list of centers on the East ballot, there isn't another player besides Dwight Howard I would take over Perk. But that's not how the all star team is picked. It's heavily based on stats, but also on team performance to a degree (or at least it should be).
Dalembert and Ben Wallace would be out right from the start because there stats don't measure up. I would drop J. O'Neal, Okafor and Sheed because there teams are grossly underperforming, and there stats aren't good enough to make up for that.
That would leave Bogut, Horford, Ilgauskas and Perk as the remaining players for the backup up center spot. As some have already mentioned, there may not be any backup centers picked, as the coaches may prefer to pick some more deserving 4's. But if they did, I would think you'd have to give the nod to Ilgauskas. He's putting up 15 and 7 on a team that's 23-4. That trumps Perk's numbers.
But like I said, I wouldn't trade Perk for any of those other players. I love what he's doing for the team right now, and I hope he keeps it up.