I have Sirius in my car. My husband has XM in his truck and we have an additional XM radio. When I went to renew my Sirius, I have to pay full price for a subscription! I was told they would not take into acct. the XM subs, that they are totally non-related. And was never offered any type of discount or deal like we ALWAYS get with XM. Is there any way I can get XM on my Sirius, or somehow get them to acct. them together? I know -- sounds cheap, but NOT going to pay full price to have a 3rd sat. radio from really the same Co.!