The 500 is just fine for movies but lacks the depth of the 600 and 800 for music. With the 600 and 800, you hear growling and texture that just isn't there with the 500. You'd never know it until you heard it, and then you can't go back.

Ian swears up and down the 600 is as good as the 800...reaches as low. I find the 800 reaches lower but that's only necessary for special effects.

I have one 800, two 600s, four 500s, and two 125s - all v4. I also have a self-modified Sony and Yammie.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated