I am going to purchase an HD receiver to use with DirecTV. I'm interested in knowing if there are any big differences in the current models on the market. I'm particularly interested in the Sony models, 100, 200 and 300 but if another manufacturer has a better receiver I'd like to know. I understand Sony is coming out with two new models this fall, anyone have any information about them that would make it worth waiting until they are available? Thanks for any assistance and/or advice.