My pally went with Aldor before I even considered what the options were. I don't recommend doing this - look at the gear sold by the respective quartermasters, the shoulder enchants, weigh them up and then pick Aldor.
However, if you're considering purchasing the repeatable rep quest items off the AH, Scryers will tend to be cheaper right now. People are getting them in spades from the IoQD daily quests and there's little option but to hoard them for future characters or hawk them on the AH.