Thinking about starting up on SoM

I know I'm very late to the party. I want to level a toon on SoM and am just wondering what realm to pick for NA. I like world pvp as well as raiding. Also how is the faction distribution? I typically like going for the underdog faction as long as it's within a decent parity.IIRC Jom Gabbar was the big realm. What's the ally/horde pop there?I figure it's likely gonna be a rough time trying to level here at this point but I have no desire to play any other mmo right now so here we are.