Hi there,
Title doesn't say anything I am afraid.
All we know it is a dedicated server and with that info you can't get any advice.
What OS is running on the server or is going to be running on it.
What is the WoW emulations server you want to use.
What is the database you want to use.
Are you going to compile the core yourself or are you going for a repack.
What is the overal goal of the server is it funpack or blizzlike.
What is the average user load your expecting.