OK - let's sort out the facts.
Radio reception from Sky can be very good - especially if your FM reception isn't all that hot or - worse still, you listen on AM.
A station like Radio 2 or Classic FM will sound top notch on Sky with the right equipment, but sadly many others are no respecters of HiFi sound by digital satellite or any other medium.
Using compression techniques or even broadcasting in mono, makes some stations on the Sky platform sound really horrible.
It's all down to what the broadcasters send up to the satellite - garbage up = garbage down...
Still it's an Aladdin's cave of choice compared with the handful of FM stations available where I live and I welcome it with open arms!
And Music Choice is pretty good most of the time.