My 721 which I love has been acting up so I was thinking of buying a 722 from dishstore.net. I was just wondering how this receiver was? Any good or bad? I can hook it up to just one tv and use both tuners like on my 721 right? Can it record ota hd and will it list it in the guide? Any problems I should know about before I order it? Also do I need two lines from the dish or can I use a splitter thing my 721 uses?