I quit WoW a couple years ago for school but since I'm done I have a lot of free time and I want to pick up the game again. On my current server, Kael'thas (US) there is like 50 people and 2 good raiding guilds so I want to transfer off of there. Does anyone know of a very populated server I could go to that has a multitude of good raiding goods and even some good casual raiding guilds for me to join once I hit 85? I'm also a big mount farmer so as a plus if you know of a server that fits the previous criteria & also likes doing stuff like Tempest Keep The Eye or Uld25 for mounts please let me know! I'm also a HUGE achievement slut.
I'm an 80 NE Warrior who cleared all 25 man raids in LK minus Ruby Sanctum and ICC. I rarely did hard modes but that's because guilds on my server found it pointless.

Preferably a PvE server since I hate PvP servers.
Thanks!