My first XM radio was a Delphi SkyFi, and at that time I also bought a portable speaker unit to go with it. It was sort of a modern boom box that allowed me to use my XM radio outside of my car. Delphi has updated that speaker system with the new Delphi Premium Sound System, which they recently sent me for review.
Read Full Review @ Audioholics by J. Walker Clarke, Jr.