Been driving around town and my stereo system seems to jump from mono to stereo anything up to 6-7 times in a 10 metre stretch. Is this related to signal strength of the FM station I am listening to or my antenna?

Secondly..... I would like to pick up the radio station I like in another state. Would you folks with Sirius out there be able to tell me if that is possible?

Cheers

__________________
PREVIOUS

2006 E53 X5 3.0D
2004 E53 X5 4.8is
2004 E53 X5 4.4 Sport
2011 E70 X5 3.0D with Aero kit
2009 E71 X6 50i Sport
2009 E70 X5 50i Sport
2007 E60 540 M Sport LCI (All time favourite car)
2007 E70 X5 4.8i Sport
2005 E53 4.8is
2003 E53 3.0 Sport