Rather dive into some PvP

Your Reputation Precedes You
Of course, the Timeless Isle isn’t the only way to gear up. Little Empire Mojo   As of 5.4, we’ve made some big changes to the older ilvl 489 reputation gear—that’d be the Golden Lotus, Klaxxi, August Celestials, and Shado-Pan gear. All of this gear is now available for Justice Points regardless of your reputation with the respective factions.
The fastest way to earn Justice Points is by running dungeons (particularly Heroic dungeons), Buy Little Empire Mojo  but they can be earned through Scenarios and even converted from Honor points if you prefer (though you’re probably better off just buying the Honor gear . . . more on that later). Once you’ve got some Justice Points saved up, head off to the quartermaster at Niuzao Temple in Townlong Steppes to get some sweet, sweet epics.
Valor Points still have their place as well. For just 250 Valor points, you can add four Item Levels to a piece of Epic gear, and you can upgrade any piece twice.  Buy Little Empire Mojo If you’re looking to gear up in a hurry, that’ll probably give you the most bang for your buck. Even if you don’t have anything you’d like to upgrade just yet, it’s likely more worthwhile to hang onto your Valor until you do.
Or Maybe Just Stab Someone
Rather dive into some PvP? Perfect.  Cheap Little Empire Mojo  Patch 5.4 brings a brand spanking new PvP season, and that means brand spanking new PvP gear. Honor Points can now be used to purchase ilvl 496 PvP gear, and Conquest Point gear starts off at 522. You can, of course, jump into Rated PvP and start earning Conquest Points at any time you like, but it’s probably wise to start off with some Random Battlegrounds to earn some Honor Gear.

Thanks to some changes in Patch 5.3, non-PvP gear can still work well for entry-level PvP. If you like, you can head to the Timeless Isle or even run some dungeons for a few pieces. It’ll still probably be fastest to earn the Honor gear, but it’s always good to have a little variety in your diet, right?