Yes, get XM
Tiny little antenna (which due to the fiberglass body I have mounted inside the right rear fender (have to mount it on a piece of metal though for proper reception).
In the vette I didnt want to trust to the FM reception method, so I sprung for the cable that allows you to connect it direct (it's the same cable that you would use to mount a stock 12 CD changer in the back). The XM Commander
is tucked up under the dash to the right of the glovebox and the very small control head sits on the ashtray cover on the console (yes it comes with a remote).
Small little fuse tap to the panel (plug and play, no changing anything, pop out fuse, put it in tap, put tap back in fuse panel, your in business) under the passenger kick panel.
You'll find a raceway for the antenna wire that runs along the right rocker panel (the rocker panel pulls off, its velcro'ed) and you can snake the wire through the right rear speaker enclosure and as I said, mount the antenna to a small (four inch by six inch) piece of galvanized steel (regular sheet metal, Home Depot) and two small screws to underside of right rear fender in the trunk. Cover it with black tape or paint it and you will never see it.
The stock bose system switches to XM (or whatever it finds on the 12CD changer line) if you hit the CD button twice.
If you want to forgo the direct connect through the CD changer cable, you can leave that part out and tune to whatever FM frequency you set your XM head to transmit on, We did it that way in my Wifes truck and it sounds fine (well not as good acousticaly due to the Bose system in the vette, but it's clear as a bell).
Once you use satalite radio you wont look back at FM again
Oh.....if you have a hole in the fender that you must use for something now that you no longer need it for the XM......you could...
Find the smallest, techyest cell phone antenna you can find, bring it to the mall to the place that does the engraving, have them engrave "VooDoo Satallite Ant-Theft Tracking System", and screw it into the hole, park with confidence