I purchased the following parts from Elk Grove Nissan (sponsors of the 7/16/05 Sacramento meet):

999U9-VR000 XM windshield mount antenna
999U9-NV003 XM receiver


I paid someone $85 to install the unit and antenna for me as I wasn't too comfortable running a wire up the A-Pillar with the curtain airbags.
The installer told me that I didn't need the receiver bracket (part no. 999U9-VQ011) since my truck didn't have the RF amp.

Here are a couple pics of the antenna.

good plug for the meet, looks good.

I ant siruis, they have more of what I would listen to, but the install kit will have to wait. I have so many other things I want first.

I spoke with a Sirrus rep a while ago and they were working on an antenna for the Titans..But it has been a while and I have yet to see it..It was going to be about the same design I belive as that one..