Depends what he's looking for in a job, there's three categories here really:
If he takes over Chelsea or City, he's not going to get much reputation nomatter what he achieves since they have a strong side already, both coming on the back of major trophies and both with near unlimited funds. Anyone could do a job at those clubs. They're the type of club Mourinho would happily take over for a few years, I don't see guardiola as the same type.
Next options would be United or Arsenal. Both big clubs in their own right, both slipping backwards from what they once were (no offence). In that sense, there's work to be done at each to build them back to the top on muliple trophy challenging fronts. At united he'd be asked to continue SAF's job which, well, won't be easy given what he achieved. Less pressure with Arsenal and they like to play good football too so he might prefer this option - When's Wenger leaving though?
Next group is Liverpool and Tottenham. Both clubs trying to break into a regular top 4 spot, both with decent squads plus a few top quality players, neither have unlimited funds, both look to be trying to build up sustainably to compete. Both would represent a challenge to a new manager. At Tottenham, he'd be tasked with bringing about a period of success where they're major force, at Liverpool he'll be tasked with bringing us back to where we were 25 years ago. Both big projects. I think he'd prefer this type of job compared to any of the others (except perhaps Arsenal).
At City/Chelsea, he achieves nothing. At United/Arsenal, there's a greater chance of failure and bad press which comes with it. At Liverpool/Spurs, it's a challenge where he can't really lose, but could profit massively. A propper challenge.
If he comes the PL, Arsenal, Liverpool and Spurs seem more likely destinations than United, City or Chelsea....but that's just my opinion of a young, ambitious, attacking style manager.
