720p and 1080i are virtually the same. If you are getting HD cable/satellite 720p/1080i is the max you need because that is what HD TV is broadcasted in. 1080p comes into play with Bluray players, so if you don't have a Bluray player, you only need 720p/1080i. Most TV's sold now have 1020p capability.
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I am wondering just how much HD I need? I have an old Sony but its' lamps are almost gone and it was a 480i, 720P and 1080i. It was an expensive projection at the time but you could hardly find anything in HD, well nothing back then. So how far should I go in an investment now? Will 720P be enough. I do have assigmatisum So I wonder if I need a high refresh rate to avoid headaches. If so, who makes a 120hz refresh or a 240hz refresh in 720P? I am retired an have limited funds. I don't want to pay much more than $500 to $700.
Your help would be much appreciated.