i play in nerz'hul and it's a really good server if you like pvp since its got alot of pros for it being a pretty old server. but i havent really heard of any major city raids going on there, but it does have alot of regular instance raiders.

but my friend told me about his friend who plays in crushridge. they had a 70-man alliance guild attack undercity and just wiped the whole thing down to the last drop of blood. but this happened a year ago and i havent heard any more city raids like that ever since.

hope that helps with your choice.