Here are a number of things that can really improve the quality of sound you get out of your Axioms:

http://www.bybeetech.com/index.html

Put one of these over each speaker cable close to the speaker:

http://www.zcable.com/z-sleeves.cfm

Put one of these on your CD player over the disc transport, one on top of your amp/receiver over the transformer and one on top of each speaker - oh yeah, and one under your satellite tv box:

http://www.gutwire.com/notepad.htm

This yields huge benefits: put Vibrapods under all speakers and Vibrapods/Vibracones under your amp and disc spinner.

http://www.vibrapod.com/

doh! I almost forgot one:

http://www.ayre.com/products/ibe.htm

"The main tool is a five minute glide tone, that when played through your system at a moderately low listening volume, will improve its sound. While we don't have conclusive proof of the mechanism involved, we suspect that it functions by demagnetizing residual fields that build up in your components over time."

One of the cheapest tweaks - put a mostly deflated bicycle innertube under your CD/dvd player. It does a great job of insulating it from vibrations and only costs about $4 bucks.