I saw this singer last year when his band Trick or Treat - a former Helloween cover tribe - toured with the true Helloween. He was just incredible, and even I think Deris brang a lot to the pumpkins in terms of songwritting, I would have killed to hear him sing the Kiske-era songs Helloween played that night.
He's also a terrific opera tenor. Would I have wanted a singer for a power metal band that I would have asked him first. I really think, in the genre, he's over the top.