Being a bit of a Boston snob growing up, I've always tended to give little credit to any album after the first two, however I've been listening to their third and fourth a lot lately (their fifth, Corporate America, has its moments, but the overly political messages turn me off as usual and it starts to move away from the classic Boston sound). Oh yeah, and their sixth, Life, Love and Hope from 2013 could easily be a completely different band as far as I'm concerned.
Third Stage
Walk On