Who know’s about satelitte radio?

I want to get stuff to customize my stereo system and I saw some bits and pieces in the internet about satellite radio stuff like no need of cd’s or tape players because its commercial free music. But I’m just confused if what’s the difference between sportster5 (http://www.sirius.com/promo) and stratus4 (http://www.sirius.com/promo)?I find it hard to determine each others differences I mean the advantages or the disavantages of the two.

they are both made for a docking station ........ you will need to compare the features to see what you want

I have the sportster 4. Couple of things it has over the other: I can pause up to 44 minutes and play it back, doesn't look like the stratus has that. I can store 30 songs/artists in memory. Believe me, the sportster 4 is a great satellite receiver for the money.