Completed Main and Faction Quests

Treemagnet

I am a level 47 Sorceror that finished the main and ebonhart quest lines. My question is where can I go next that will allow me to gain experience. I assume I can go to Reapers March and Bangkorai but what are my other options to gain the levels necessary to hit Veteran status.

NobleVulom

After completing the Ebonheart Pact the next alliance to go in order to gain experience would be Daggerfall's questline

Nestor

If you completed the Main Quest for the Prophet, as in had your little meeting with Molag Bal, then all the zones in the game are unlocked for you. Go wild.

However, at L47, you still have the Vile Lab and Public Dungeon up in Coldharbor to lap a few times. You can get to L50 in a couple of hours doing those.