Haye is avoiding the Klitschko's, he wouldn't take a 50/50 split even though they're bigger names. To be honest though I think it is a wise move that he's pulled.
He isn't ready for either of the Klitschko's yet IMO as he is too inactive and needs more fights. He doesn't fight as often as them and they've faced the toughest heavyweights out there and dominate the division where as he has only just moved up from cruiserweight really.
He needs to be careful with Harrison. He should piss it really as Haye is an excellent, slick boxer with power but Harrison has awesome KO power.
Haye should win but you never know.... 