that's right, he's a pep guardiola-esque football colossus we'll be fighting all the greats of Europe to sign up... 
So those are the only two choices? You either get the man who is widely regarded as the best manager in the game or you get Roy? No in-between? Thank you for proving my point.
Here's what I want in our next manager, not necessarily in order of importance:
1)Tactically flexible and intelligent
2)Good man manager (and by that I mean the ability to get players to play "above" their assumed ability)
3)Someone who gets 11 players to play as 1
4)Understands the supporters
5)Identifies and incorporates young players
6)Good with the press
I think if we can get a manager who has those 6 qualities it will be a very good hire. I don't care who the name is or where he comes from; I care that he can perform those tasks. Martinez for me has demonstrated an ability to perform 5 of those tasks to some degree. That isn't to say he would be a hit here, but I think he has a chance for those reasons. He plays a pleasing style of football and one that I think can yield results with better players like Suarez, Gerrard, Lucas, and Agger.
As I've said, he wouldn't be my top choice, but the people in here writing him off because all he's done is avoid relegation are really really short-sighted.