In terms of "difficult" fixtures, Arsenal have Liverpool and Spurs, Man United have Chelsea. Plus they've got to face each other at the Emirates.
Pretty much even from that IMO.
I think the fact Man United are still in the FA Cup and CL makes Arsenal slight favourites. But the fragile nature of Arsenal, the fact they have stumbled so badly in recent weeks and their general lack of a backbone suggests United will win the title.
You know for a fact Fergie will be bitching like crazy to his squad over everybody being against then because he's got the touchline ban. He'll use that as a positive to get the squad focussed. Can Wenger focus his soft Arsenal side to forget all they've lost out on in the last few weeks and steal the title? I sadly think it's possible he will be able to. Seeing the cleared fixture list and the injuries that United are picking up should be able to clear their heads so they do win the league.
I just hope they don't though. Then Wenger will get all smug and say he was building for this all along, when the truth is that they'd only get the title because Chelsea and Man United have fallen so dramatically.