Sea King is great
I have a Sea King that cost about $1500 less than KVH and it is presently mounted to my stern rail. It work great and I have never lost the signal even while sailing. I have Tivo so I tape a lot of sports stuff, movie etc. and watch it at my convenience. The units is large and I am in the process of mounting it on a tower to get it up and away from the deck. I bought a small 400 watt inverter from auto zone and it runs my TV as well as the Sea King. Down side it is big and can become habit forming.