I still listen to them, something I can't say about Rapeman. I've only heard an album and a couple singles by Shellac, didn't grab me. What's their best record? Probably better live. Personally I'd rather read an interview or have dinner w/ Albini than listen to his music, he's an articulate fucker.
Big Black...I still wish I could make out the lyrics to "Tiny, King of the Jews."