The portable/wearable Sirius Stiletto is light and compact enough. It also includes its own built-in MP3 player.
However, the battery life is used up fast during live streaming of satellite radio programming. It lasts a LOT longer if you’re just using the MP3 function to hear music. I guess it could work for a long AT hike, maybe even a thru-hike, if you have a way to recharge it every three or four days. The recharger could be carried or moved ahead in a bounce box so you could do it in towns.
The programming diversity, both music and special interest channels, is awesome. Nothing else like it except XM, which Sirius is 98% thru the process of taking over.
As for reception, the Stiletto loses signal in deep woods surrounded by solid objects, like rock. It works pretty well on and near ridges–which the AT is often routed over. I wouldn’t count on a steady strong signal while hiking some days, but it would probably work well when you’re stationary (camp, rest spots, etc.). The nice thing is you don’t lose signals as you move north (or south) like you do with AM or FM. Find a few stations on Sirius you like, and keep 'em the whole way.
I see some folks dayhiking in SNP with the Stiletto. They say the signal can be maintained pretty well unless they take side trails deep into one of the hollows. Sirius is probably a better investment for them because they can recharge it once their hike is over each day.
Once the Sirius/XM merger is complete and the dust settles, look for new generations of receivers and programming lineups to gradually emerge.
Skyline