Re: American IPAs
Sierra Nevada is pretty much my goto when I'm on the road East of the Rockies. It's not bad, for a mass-produced beer.
That said, there are locations all across the US that have preserved plant sugars well worth sampling. I always ask a local where to eat when I'm in a strange place ... and ask the chef there for suggestions on local brews & vintages. I'm rarely pointed in the wrong direction.