I am looking at getting an XM unit for my van. It is a 2003 Ford with OEM Radio/CD. I have noticed that most, if not all, units come with a FM modulator that plays through your in-dash unit on different frequencies. Is this a good remedy for going in an having someone hard-wire the unit. What is the quality of sound and has anyone had any real issues with this set-up? I know that in early units of CD players years ago there were a number of issues and people in general did not like the "wireless" units. Thanks, Mike