ok so i have a 2010 with the upgraded premium pioneer headunit. i'm wanting to get satellite radio and know that its satellite ready but that i need a receiver and antenna. question is, are there any specifics that i need to search for like model or something? i've never dealt with in car audio so have no idea what to do. i tried the xm and sirius sites but they just offer new headunits with receivers and antennas when i dont need a headunit. sorry if its a dumb question, just dont know where to start.