0. (added late) Golden Leaf Pale Ale (City Brewery, La Cross, WI) - best use of Cascade hops I've ever had
1. Central Waters just about anything (Happy Heron Pale is excellent)
2. Great Lakes Burning River
3. Lake Louie APA
4. Tyranena Bitter Woman IPA
5. Great Dane Maibock (Madison, WI micro; they don't bottle any of their beers, though you can buy growlers at the bar, so you'll have to drink it on site. The food is good, too!)
Massachusetts and the rest of New England don't have **** for beer. If you live in the Midwest and enjoy beer, don't come out East. It's a real bummer.
+1 Carlsberg. That's a delicious and smooth-drankin' import. Asahi Super Dry is similarly wonderful on hot summer days.