American Micro brewery hopping is a fantastic way to spend some time in the States.
Denver has some crackers as does Seattle.
I am a big fan of the IPA's brewed in America. Quite fruity.
One of the cupboards in my outbuilding is slowly being covered with the various stickers that some of the breweries produce.
Fat Tyre was always nice in Denver. But, you'd buy 6-8 bottles and one was always cloudy and 'off'