I have a line on a Beosound 4 and pair of Beolab 3 speakers. The Beosound has DAB as a feature on it. I know very little about home audio, and so am wondering if I need the DAB feature in order to access satelite radio (Sirius, etc.). Also, if anyone could provide their opinion of a Beosound 4 and Beolab 3 combination as a music system for a large kitchen