It depends on the situation. If the guy is just standing there screaming, I would use a condenser. If he is one of those guys that has to be holding and cupping the mic to 'get into it', a 58 would be a better choice. I've had good luck with the Sennheiser 858 (?) hand-held live mic. It doesn't get as muddy as a 58 when cupped and screamed into.