Most of the decks out there are only "sat" or Sirius ready, meaning that you
have to by a extra tuner for them. Also make sure that the deck says that it's
Sirius ready or SAT ready. Most of the older Pioneers and Alpines are only XM
ready, you can still get Sirius tuners for them but you may lose a few
options, mostly in the display area.

I have Kenwood KDC-MP522 with a SSR-TP902CX Sirius tuner. The tuner uses a cd
changer cord that is long enough to mount the tuner in the trunk all you need
to do is run it from your radio to whenever you want to mount the tuner, best
place to run it is under the carpet. The only other connection it has is a
single wire antenna that I just mounted on the trunk lid, it's easy enough
that even a noob can do a clean install. My tuner sounds a lot like a good
mp3, my kenwood also has a buffer (delay) so that if you hit a dead spot as
you are driving it will not cut out like FM would. The reception is really
good on my unit, I get signal in my garage if I park beside my small 3'x 2"
window. It's truly a nice upgrade over FM radio.

You should figure out first whether you plan to use the Sirius receiver
in other places besides your car... if so, you want to get a
transportable (Plug and Play) model, not a SiriusConnect tuner that is
designed for permanent install with a matching head unit.

The transportable can be connected for direct audio also, just need a
3.5mm stereo to RCA cable (the cradle or receiver has a 3.5mm Audio Out
jack on it) and a source or processor that can handle another input.
This will sound better than FM modulation.

Big advantage of transportables is that the $12.95 a month subscription
cost can be put to use at home, in the office, at the beach etc. Get a
home dock, boombox, or other docking accessory and you can have Sirius
content wherever. Between S50, Sportster Replay, and Starmate Replay
receiver platforms there's a plethora of docking options to choose from.

If none of that matters, go the other route. SiriusConnect tuners are
available for Alpine, Kenwood, JVC, Sony, Panasonic (coming very soon),
Clarion, Pioneer, Eclipse, and others. Or you can use a Starbase model
with essentially any HU as it has its own display/controller, although
again you'll get better audio performance if the HU or a processor in
your systme can accept RCA inputs directly from the Starbase tuner.

JD