I came a across what might be a good one today as I was listening to some old favorites with my new R500's and SVS SB-1000. Fiona Apple, album "Tidal", first cut "Sleep To Dream". It's loaded with deep bass drums and electric bass guitar. On my previous system, it was all thump and bump. Now it's CLEAR and just so damned depressing. And I mean that in the nicest way.