Will you gain reputation for any important factions while leveling up in the Pandaria zones? Factions that sell usefull things at lvl 90. Like in Cata where you could buy 5-man Heroic level gear once you were Revered. The reason I'm asking is because I want to know if there is any specific zone I should focus on for questing so that I could have as much rep with a certain faction as possible once I get to 90.
Bumping this up because I didn't want to make a new thread about this but I haven't been able to find much on it and would like to know some more. As the poster above me said is there a source where the reputation factions are gone into in more detail? What zones to quest through/how far into questing, etc. Would be much appreciated.