Berserker then what?

I can't seem to find a rank list ...

What do I get to be next?

 

I cannot find something official yet I found

Then berserker upto 250 posts(i think)
Then 250 - 500 posts - Raider
500 - 1000 - Tauren.
1000 - 2000 -> Spirit walker(At present i am at this stage)
and so on...............

http://forums.digitalpoint.com/showthread.php?t=103192&highlight=Berserker

 

http://forums.digitalpoint.com/showthread.php?t=66014

 

Great thanks

 

http://forums.digitalpoint.com/showpost.php?p=1625&postcount=16

Check this post aswell, describes another ways to thanks by adding reputation to the message poster.