Well, I'll give you my $0. 0175...
I have the Sirius system, as it is what my Kenwood deck is compatible with. I'll tell you, I LOVE IT. Nothing better than knowing that the 5 stations you listen to all the time ALWAYS HAVE MUSIC ON. Yeah, there's quite a few music stations, but I'm not really the Latin type guy, nor jazz, nor the other ones. But, the ones I do listen to (rock, country, top 40) are all excellent stations.
My install ran me $208, that was with the receiver antenea and everything else. I believe the deal right now is still $75 instant rebate, but only if you have a dealer install it, which is where I bawked, but didn't have a choice... so I helped them install it... .
I've made two 1000 mile trips with the system in my pickup, and have had scratchy service twice... . both times in the same place in the middle of Nevada where you're in against two huge mountains. Other than that, it's been perfect.
Like I said, mine is controlled through my Kenwood deck (KDC-X917), and I believe almost all new decks are compatible with some form of satellite radio. My service runs me $12. 95/month, with a buy 11 get 1 free deal.
So, any other questions? Also, the receiver is under my pax seat, and will be able to accept a cd changer when I get one (which I'm not sure I'm going to now w/ the Sirius radio).
later, Josh.