The gear comments in the two above posts seem to echo what Joana wrote in his leveling guide: gear simply doesn't matter for leveling. Sure, if matters if you're trying to clear BRD at 52, but to fly to level 58 using RAF guide, I think you can do it in grey gear, or naked for that matter. Blizz was very kind in that the first handful of quests in outland basically re-equip you with level 58 gear and you're all set. You can save a ton of money by only training a bare minimum of spells, don't waste mana buffing. Use level 1 toons in the major cities for 'friend' summons to cut down travel time. It's nice not to have to worry about logging out in an inn too.