I am going to change my old MX tv box, have done some research on google, it seems that the Amazon's tv device and the Roku's tv decice, so I decided to select one from this two brands...I found a top tv boxes review one google, saying that the Amazon Fire TV got over 10,000 apps for the tv box but only 140 channels, and the Roku Ultra got over 3500 channels but not as much as app selections like the fire tv. anyone have experience on the both devices? which one is better?