I think that if Chelsea offers him the job, he'd go. He's far to aware of his own reputation to not take that on. Personally, I would love to see his happen; he's just not a good "top" league manager; by which i mean he can make a mediocre team good, but he can't make a good team great. He lacks whatever DNA combination it is that the greatest coaches have that can push a squad to roll out their best most days, and scrape a result even when they're off their game.
So long 'arry, and good riddance if he leaves.