Satelite Radio 2011

I just traded my '09 for an '11 and would like to install a satelite radio receiver and fit kit. I've gotten just about all of the information I need from searching through old threads but have one small but of confusion.

Do I buy the Sirius or the XM receiver?

Is it my choice (I know they are both the same content since the merger)? Will one work on 2011's and one not? In 2010 threads people are installing the Sirius receiver PT546-08000. The Toyota web site advertises XM compatibility on 2011's with no mention of the word "Sirius". Calling local parts departments gets me varying answers. Some say to buy XM receiver 86180-0W032.

Do any new 2011 owners on here have satelite radio? If so which one do you have so I can buy the receiver

Thanks,
Bryan

 

I'm going to change my stock h/u toyota dealers are clueless and the h/u SUCKS! Then go from there.