That being said, I would have just called. No sense putting your life on the line here. Villain is only calling your poosh with hands that will beat you.
My instinct says he has Kx in the BB. But that's against schmucks at the little tables. With that in mind, I'd raise to 600 to eek out a few more chips.
BUT (and a big but) if this guy's any good, then I agree with the consensus that the call is the safest route here.