Frankly the best beer I've ever had isn't sold by the bottle, isn't carried by liquor stores, isn't available online, and isn't shipped. You've gotta go to the source.
In Anchorage, AK, there is a restaurant called "The Moose's Tooth" (named after some peak on Mt. McKinley I believe). Their main food is pizza, and some of the best pizza in the world. They ALSO are a microbrewery, and brew all their own beers that they serve. You can buy by the glass, pint, or fill up a growler to take home.
By far my favorite that they brew is a DARK stout called Pipeline Stout. It's literally as black as crude oil, as you might expect from the name.
For anyone who is planning a vacation to Alaska and wants to have a fun dinner to top off the trip: Forget Simon and Seafort's*. Forget the Double Musky*. Hit up the Moose's Tooth for a "Santa's Little Helper" pizza and try out every beer on the menu.. and make sure to take a cab
Also be prepared to wait an hour or more for a table during peak eating hours, as the Moose's Tooth doesn't take reservations. It's totally worth it, but when I eat there I try to hit it up around 3PM on a weekday and I USUALLY don't have to wait for a table.. but not always because it is THAT GOOD.
*But if you can hit these restaurants up as well, DO IT. They are real award winners, they just don't fit into the "beer" aspect of this thread.