I'm thinking about getting a dish system at home to replace the digital cable I currently have. DirecTV and Dish seem pretty comparable on price, so I'm wondering what other features might distinguish the two of them? And in receivers, any brands/models to recommend? I don't need a PVR unit (already have Tivo), and I'm not concerned with HD at this time. I would just want a high quality receiver that has good digital outputs for video and surround sound. Thanks!