I would go to the IC but that sever SUCK SO HARD! Im not saying that Lord. is bad but as someone wrote you must have atleast 10-12 hours of hardcore raiding to clear all bosses on one ID + You have to be in good guild. On Alli side there are 3 good guilds which are full on every role. That means: You must have lot of time and you have to be in good guild due to that boost (On Alli side you wont get to the raids so rip).
Solution: After ToC will be released nerf Ulduar a lot. The main reason is that every player should be able to do alteast full run with normal modes. 90% of population are casuals or dont have time to progress in good guild.You cant make server for 300-400 players. You are losing people due to this. ToC would be boosted and after ICC will be released it would be nerfed too. cWwhat about ICC? Thats the question that I cant answer. You have to do something about it unless you want to make 300-400 population realm.
