Just upgraded recently from my 6 year-old Onkyo HT-510 speakers to the Athena's from audioadvisor. Still using the Onkyo HT-R510 receiver and the Onkyo sub though. Eventually I will upgrade both. So I ended up choosing the LS-500 package without the subwoofer. My current configuration is:
2x LS-500 Tower Speakers
1x LS-C100 Center
2x LS-100B Bookshelf Speakers
1X Onkyo Center Speaker (for rear center)
1X Onkyo Subwoofer
Onkyo HT-R510 6.1 receiver
Samsung LN26A450 (for future bedroom)
Xbox 360 Elite
Dish Network (soon to be ComcastHD)
My sources vary a lot; I run a pretty even mix between tv, movies, music, and gaming. So far I am very pleased with the Athenas. I am not much of an audiophile, more of a noob and a videophile lol.... but these speakers are turning me into a total audio-fiend. These are by far the best speakers I have ever owned.
Someday I plan on upgrading the receiver to something with good HDMI pass-through(probably a newer onkyo), another set of LS-100's for 7.1 rears, and a much better sub. For now though, this system is really putting my sources to the test. Now I am noticing imperfections from some source material that I never knew were there. Other than that most everything just sounds amazing, not to mention the speakers look very nice with the rest of my setup.
Here's a pic of everything in front: