I have a few general questions that may not matter on the provider but if they do let me know. I've been thinking about getting a satellite radio system for a little bit now. I'm leaning towards XM as they have a really nice portable unit (Delphi Skyfi) and they have a good selection of channels. However I'm not too sure how good the reception will be at my workplace. Should be no problem at home but the office building I work in has a large amount of steel (or some kind of metal) and a large proportion of the roof is also made of metal. AM radio reception in this building is quite poor although FM seems to come through fairly well. I want to know what kind of reception, if any, for satellite radio I can expect? Also does Sirius have any manufacturers that make nice portable units for their service? I want to be able to take this unit between home and work and right now the Skyfi is looking best although the large amount of sports networks on Sirius has me tempted. Btw for the reception question I live in the Littleton, CO area and the office building is in the same area.