For me McLaren is a Blues, Baggies, Wolves, Wigan level manager, ie a manager who you would think was doing well to get them to mid-table. He's not a top half manager and definately not a top 6 manager. I would also put Martinez and Coyle in this bracket.
We need a manager who has acheived or has the real potential to acheive a top 4 finish, which imo leaves us with FSW, Moyes, Hughes (?) or Lotti.
Moyes would be my vote as I think he can steady the ship without causing major disputes within the playing staff.