The best managers in the world are really the best managers amongst the the high profile clubs. You might be working wonders in 2nd tiers/leagues and have everything it takes to be a top manager but you won't be seen as one until you get a top job......Identifying that kind of manager, and giving him the time necessary in a world that wants everything yesterday becomes a problem.
Of course we can and probably will just go for a household name.....but I kind of wish we had both the guts and the nous to sign somebody young and progressive like we did when we signed Wenger.