I have a Sirius radio that is "suction-cupped" to my windshield and plugged into the aux plug of my radio. My antenna is attached to the top of the hard top (outside). The quality of the sound is awesome. Better than FM, actually. But the reception is sometimes OK and sometimes so bad it's TOTALLY un-listenable. And it has very little to do with trees/bridges over head. Do others have this problem? And if I put in a Sirius ready radio into the dash and ditch the docking station I have now, will the reception be better? Thanks for your help.