which server to play on ?

hi all
i want to play wowtlk but i have some questions before i start
1-is only the rates are different between the realms ??
2-which is best for pvp ??
and thanks

Hello Tareq, warmane has 4 realms to play wrath of the lich king on.
Lordaeron: the rates are x1, it is a hardcore realm for those people who want to have the same experience of retail wrath of the lich king
Deathwing and ragnaros: there is no difference between these realms, both are x7 xp and x5 on gold, on may the 20th these realms will merge into 1 realm.
Blackrock: this is a pvp only realm where you can start with a level 80 of your choice and pvp instantly.

have fun :)

thanks alot
i will mainly go pvp
so lordaeron or ragnaros ?