Go big (or local) or go home...
If you're buying commercial, grab a growler or a sixer from a local brewery/brewpub...
Don't have any close? I agree with Goose Island. Ooh, and Dogfish Head...
It may be expensive, but once you crack open a 90 Min IPA, India Brown Ale, Bourbon County Stout, or Pere Jacques, you'll be okay with it