Which Sirius satallite radio unit will give me the best SQ?

http://www.crutchfield.com/S-NhfanNS...130SIRPNR2#Tab

or

http://www.crutchfield.com/S-NhfanNS...47350&I=607ST4

I am going to hook it up to a Pioneer DEH_P9800BT head unit that i plan on purchasing soon. Also how is Sirius in terms of SQ? I want to go with Sirius because i listen to a lot of rock/hard rock and I have found/heard XM to lack in that area.

 

go with the pioneer add on if you are going to get a pioneer. The other piece will play through the fm radio.