I've always found plain old Yuengling to be better than the Sam Adams lager. Brooklyn Lager has a much hoppier, sharper aftertaste if that's what you're going for.
Also, as a Yankee fan, out of principle, I won't drink anything called Boston Lager that has commercials featuring shots of Fenway and Beantowners talking in that horrible Bah-ston accent about how great their beer is.