Liquor laws in the US are a mess and there's lots of hands in the pie - so to export really becomes a nightmare. You are right that the smaller US brewers (and smaller Belgian brewers FWIW) make the best product in the US. Like music in the states - popular means generic and it's only those brewers that are not concerned with a massive audience that are really making great beer. New Glarus is probably the best brewer in the US and they can't even get their beer to most states. I have to drive about and hour north to Wisconsin to get their beer - but it's worth it - they are phenomenal. DogFishHead is a very well-known US brewer that exports - they trand toward the typical us overhopped style which is not to my taste - but it is well loved. Stone is another big US micro that exports - also pretty hoppy. What the US lacks is really good session-style lagers - nothing that compares with the clarity and balance of German beers like Spaten and Paulaner. No US pilsner is worth a damn. New Belgium brewery in Colorado makes decent beer - but nothing amazing IMO - just good when it's a good price - passable otherwise. They are VERY VERY overrated. Southern Tier has a strong reputation but they are too inconsistent and too hoppy for me. Lagunitas is more consistent - but also way too hoppy. Jolly Pumpkin from Michigan makes gourmet-level sour ales that just rule if you like the style - not sure if they export - but their products are about as close to Belgian sours as it gets. I do not care for Hennepin or the Canadian Unibroue fake Belgians. They are just bad versions of far superior Belgian ales like Het Anker, De Proef, De Dolle, De Ranke and others. Just get the real thing - it's the same price believe it or not.
"He does lots of weird zen crap and philosophies to keep himself grounded." Thekillerkiwi