McCain v Obama Debate Posturing

What should Sen Obama do about Sen McCain's challenge to ten townhalls? Humanity Critic has suggested that he is correct to decline the challenge in his post Hey Barack, give McCain's "Townhall" idea the Gasface!(Vibe.com) over at The Nappy Diatribe. I agree but think in order to look strong he needs to up the ante. He should give McCain a challenge that looks even more bold than McCain's. He should challenge McCain to a series of debates that include traditional debates, McCain's preferred townhalls, Lincoln Douglas style debates that he has suggested, and my favored Chess Clock Debate. This will force McCain to be the one who backs down.