Since I had the fairing off last night to replace the burned out indicator lights, I decided to move the XM antenna. I got the antenna off of the bracket with the heat gun, but the adhesive foil on the underside came partially off of the antenna base, exposing a nice little rare-earth magnet. Cool.
I reattached the foil tape and then placed the antenna, via the magnet, no tape, to the base of the windshield pouches, between two of the pouches. It's almost hidden.

I then ran, and taped, the antenna wire under the left pouch and behind the windshield through a tiny little notch I filed in the inner fairing very near the left windshield bolt.

I buttoned everything up and checked it out and now I can even receive, although with a good bit of fade, an XM signal in the basement. Before, all I got was No Signal.
It was an easy fix, and yielded great results. That fairing must be lined in lead or something.