I was looking at upgrading to the hopper and was quoted by 3 different reps for $50 and free installation. None of them said there was a price difference between the sling loaded and the non-slingloaded until I just read this. So is the $150 diference really worth it or getting the regular sling unit a better choice? I thought I had read that the stan alone sling was $49? If so why would anyone spend more to get the same feature? Also are all the apps the same on both units or only one? Thanks