Technical Server info

[Treshar]

Hi,
First up, i am new here, brand new. I am a refugee looking for a new home.
Maybe i am completely blind but i see there are several servers to choose from but i cant find any info about the difference in each server. Is there a page somewhere that compares each of the servers and displays their different features?
Second, i have the client downloaded but obviously have to edit the realm list, where can i find the realm list info?

Its been a while since ive setup a new client, any help would be appreciated.

[Mitzen]

Onyxia - seasonal realm. Progresses through Vanilla to end of Wrath of the Lich King. At the moment it's at Ulduar patch. x5 rates.
Lordaeron - Forever 3.3.5 realm. x1 rates, but end-game content is tuned to be harder.
Icecrown - Forever 3.3.5 realm, x7 rates. Often the go-to-realm to play. Most populated.
Blackrock - Instant 80 PvP only realm. Crossrealm PvP with realms mentioned above.