Even the cheapest of systems gets all the channels, but you want to get a half decent one with AC3 audio and USALS, I use the FortecStar Lifetime Ultra, but the guys here are raving about the new Coolsat Pro.
http://www.satelliteguys.us/showthread.php?t=63321
All the network channels are up there, and a few news channels ONN, CNN Headline News, ABC News now.... (bad feed right now) we even had Fox news up until a few months ago.
You can do it and we are all here to help!
Even if you get a motor (highly recommended) I would start without it and bag a few satellites then add it! No shame in that, I started that way!
I like 'IA-6' for live news feeds, but there are a few more key satellites, but if you can get a dish setup on this one satellite you would be VERY happy!