For people who have an Onkyo, Sony or other Sirius or SAT Compatible receiver (must be SAT or Sirius compatible, not just XM compatible), you can get any recent 'universal dock' receiver and use the SCHDOC1. This lets you remote control your plug and play receiver (Sportster 3 / 4 / 5, Starmate 3 / 4, Stratus and Stratus 4, Stiletto 10/100/2) with your Home Theater tuner. Then you can still take the radio 'head' and move it to your car, boat, etc. without an extra subscription.
It's basically the best of both worlds.
Here's the manual for it -
Here's the current compatibility list for AV receivers -
It does have some shortcomings, namely that in the dock it disables the on-radio controls but also it disables features like game alert, song seek/artist seek, and on the Stiletto radios it disables MP3 playback, Recording and scheduling. Of course, your home theater unit doesn't support those either..
I just have a regular home dock for my Stiletto 2, it's plugged into my LINE IN on my computer so I can share the speakers. Having it on Dish was cool when I had the in-car-only Sirius setup from Kenwood. I'm actually surprised how many people listen to Sirius on Dish.