I usually limit the Crystal in my ipa's to a half pound or less. That being said, I don't think a pound is too much, just less than I would use.
I like the pound of Vienna. I usually do either some Vienna or Munich, and a pound seems like the right amount to me.
More late or dry hops wouldn't hurt at all. I'm a big fan of late Chinook hops, too, but I know not everyone is. Other than that, I don't feel quite experienced enough in hops varieties to recommend any thing else. Hope that helps you though!