Which Sirius unit do I need for the Avic-f900bt?

I have the unit coming on Saturday with the Camera and iPod cable... but they didn't have the Sirius unit that was needed.

What all do I need, to hook up Sirius to this unit? Just the receiver and antenna, or there adapters, too?

You need a SIR-PNR2 if you can find one. If not you need a CD-SB10 and the SCC1 tuner