Thats right, sirius dropped their price... it did used to be $14 a month, and people that origionally paid for a full year of service at that price, are shit out of luck. The antennas look identical, mostly because a few select companies make them, but the internals are different. Also, some tuners use a single output antenna, and some use a dual output antenna. As far as the tuners go, XM is making all of their tuners now... no more alpine or sony, etc. tuners for XM radio. You'll be buying a XM brand tuner and need to use an interface to make it work with your aftermarket deck, so I dont see alpine making a dual tuner, especially because they are XM people, not sirius.

Im not dissing either company, I just thought Sirius was still more expensive per month, so that would persuade me to go with the cheaper one, but I guess thats not an issue anymore.