which receiver to buy? are some better than others?

hi, im new her on your forum. I am looking for some info on which receiver to buy. I only need it to watch live TV, no record facility needed.
Skybox F5s. , cloud ibox, blade 5000s, and lots of others available. also when i need servers, are they compatable to every box or special servers for each type of box.
sorry for all the questions but im trying to get this right.
thanks