If you want, I can post a photo of the "perfect rear" now, and you can curse me later! \:\)

To expand on one of your points:

Because of the inverse square law, to get those rear speakers that are 16' back to sound "level" with the rest of your system, you're really going to have to crank them up in your amps level controls. Throw in the fact that they're smallish and not as efficient and you're really going to be trying to get some gain!

::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::