I use the 7 inch Fire HD. I really like it and I do a lot of reading on it, from my morning paper to lots of books. The web is pretty nice on it and tapatalk is great for forums. There are no satelliteguys or Dish sling adapter apps yet though.
I highly recommend a Prime membership with this device. It gets you the streaming service but it also gets you lots of free books. You can check one out per month and if it takes you longer than that to finish you can keep it as long as you want. You just can't get another free book until you return the last one. Not every book is available for prime but they do have a decent selection.