Hi Folks;
I won't even ask if these are off topic or not.  At any rate I don't have xm 
or serious (poor me) but I am wondering if the same receiver can be used for 
either or both or when you change from one to another do you also have to 
change hardware?  My kids (in their 20s) both have serious in their cars 
primarily for football.  Its a shame that one has baseball and the other 
football.
Richard