The one thing that concerns me about Haye moving to Heavyweight is this quote:

"In his last bout, he moved up to heavyweight and, at 217 pounds, blasted out WBC top-fifteen ranked heavyweight Tomasz Bonin. He knocked him down three times in this one round demolition in London. Haye believes he can fight not just as a 217 pound heavyweight but at 230 pounds."

Why would he want to bulk up so much? It would only take away much of his natural advantages IMO.