First off I am SD based and do not want to go to HD. I have 3 RCA receivers in the house and happy with. We recently bought a motorhome which came with 1 Sony Really Really Old SAT-A1. Real big, clunky, and you can almost heat the front half of the motorhome with the Sony. I also hate the menu system. Since the motorhome antenna system is a dual LNB King-Dome, I added a Samsung S70 for the bedroom and really like it. Good price from a eBay seller, it is small, operates in the entertainment cabinet without a lot of heat, and I like the menu system (similar to the RCA House receivers). And I did not have any trouble activating it with DirecTV. The motorhome (in the entertainment cabinet also has a Sony Sound System (can't remember the model) with a Fiber Optic (??) input capability much like one of my RCA House receviers has. Searching the net I determined that Samsung also made one model up from the S70 Receiver, a S75 that can output via the fiber optic. Any opinions on the reliability of the S75? So that is my target for eBay buying, a Samsung S75. But No Luck so far in finding one. Also I was able to determine (maybe) that a Samsung S70 is the same as a 300W, and the S75 the same as a 303W in functionality. Is that true, are they the same? Does anyone have a reliable source for the Samsung S75/303W receivers???