It's hard to pin down specific songs as classics, seeing as most of their songs are well above average. But in my eyes, the whole Still Life album is classic, as well as "When", "The Drapery Falls", "Dirge for November", "Advent", and "Nectar" (I'm not really too keen on Orchid, and haven't listened to it much, but once classes end I'll take the time to really listen to it)