edvacdude, it appears you have 7.1 speakers and amp, but no discrete 5.1 music playback (except for Dolby 5.1).
If surround music is important, I'd recommend a combo player (DVD/CD/DVD-A/SACD), or lacking that an SACD player.
For DVD vido albums, Roger Waters - Live In the Flesh is great, both sound and video. Waters wrote all the lyrics on Pink Floyd's famous Dark Side of the Moon album.
For surround music without a DVD-A or SACD player, DVD-A albums have a Dolby 5.1 "fallback" track which sounds great. You can play them on most any DVD player. Good examples: Fleetwood Mac - Rumours (DVD-A), Eagles - Hotel California (DVD-A).
If you have SACD playback there are some superb surround albums: Pink Floyd - Dark Side of the Moon (SACD), Elton John - Goodbye Yellow Brick Road (SACD), Roxy Music - Avalon (SACD), David Bowie -- Ziggy Stardust (SACD). The Pink Floyd SACD album is especially spectacular.
Just because an album is SACD, DVD-A or surround doesn't guarantee it will sound good (even on Axiom speakers!) There are lots of poorly-engineered albums out there.
