Satellite radio antenna mounting & wiring

[silverback]

I'm getting ready to add some form of satellite radio (still debating XM or Sirius and portable or hardwired) to the trailer and truck. I've looked at most of the kits and they all seem to come with a magnetic antenna mount. That will work OK on the truck, but we haven't had much success with magnets and aluminum . How are you satellite radio listeners mounting your antennas? FYI - I am leaning toward the XM direct box which should hook right into the factory Sony head unit. Also, I did a quick search before posting this question and didn't see anything else on this topic.
Thanks,
Ken