I have been looking for an XM Roady2 receiver, to listen to Pac 10 football this season, and I have found most of the XM products are sold out.
I had an order that was cancelled at Amazon, and tried Circuit City, Good Guys, Target, Crutchfield, Fry's and a couple others. Sold out everywhrere.
Lots of Sirius available. XM is leading in the subscriber race.
check out xm411.com
If you go to each companies website they will have listing of program content.
If you live in a big city with lots of high buildings it will affect reception.
Best Buy carries XM & Sirius.