Sirius Radio, Advice and Suggestions

I just purchased a new Ford and it came with a free six month trial period of Sirius Radio. I'm beginning to get hooked on it and I'm considering subscribing to it. If I do decide to subscribe I do not want to be restricted to just listening to Sirius radio in the car. So, I have been looking at what is available in receivers and I can't decide on what which ones to consider buying.
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What I would like to know is:
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1) What is a good portable radio? I want to be able to take it to the gym, to work and most importantly hook it up to my stereo at home. I have looked at reviews for the Stiletto 2 but it has gotten mixed reviews. I don't care about any MP3 capabilities. All I am looking for is something portable that I can connect to the home stereo.
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2) How much extra does Sirius charge for an extra receiver? I can't find any price on the Sirius web site.
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3) Does anyone know what kind of discount they give for Ford customers that extend the free service? The Sirius web site implies there is a discount but does not give any details.
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Any other advice or suggestions you can provide would be great.
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Thanks!

1. The stiletto is about as good as it gets and I agree, its not great.
2. I think that additional subs are somewhere roundabout 7.99 a month (I haven't looked at my bill in a long time).
3. No idea, I would just call and ask.