If you don’t plan ahead, getting to Revered with Honor Hold can mean a lot of Shattered Halls runs. You’ll need to be Revered to get your Heroic key for each set of instances, and it’s likely that at least one faction will have a reputation item that you’ll want to buy. Once you get to level 70, you will soon find that you want to be Revered or Exalted with a lot of factions.