I've got an XM right now in my 04 S60 and will be trading it in on an 06 S60R. My thoughts are to just remove my XM and put it in the new R. Or, would you recommend having the dealer install the sirius (which is already prewired in the '06)? It seems a bit high to charge $700 for the factory sirius. Plus, I like the look of my XM unit with the blue background to match my car. Circuit City will uninstall it for free and install it in the new car for $75. I just mount it in the cubby hole to the left of the stereo.