Foxxtrot wrote:
Also, the above poster pretty much nailed it. Defiantly get that helm enchant from Kirin Tor first. The rest will depend on what stats you are looking for.
Indeed, the helm enchant will last you forever(or until the next expansion) and the dagger is the best one out there pre-raid(I'd take it and the badge offhand over the epic staff from Oculus any day). The other non-replaceable(and non-championable as well) faction to start grinding is the Sons of Hodir. Their rep is only raisable through dailies and they have quite a few(don't let the spear one get you down, it's hard at first but gets easier as you learn it...always mana shield right before the dragon picks you up). They give you shoulder enchants that beat the old scryer/aldor ones by a fair amount, and they don't require you to gather fel armaments/arcane tomes to boot!
As for epic rewards, I've found the Wyrmrest boots to be the longest lasting(nothing out of Naxx 10 that I would replace em with) and you can't beat the mount from them(unless you have a bronze one!).