If I was you I would run the wires along the walls or ceiling and not under carpets as for you speakers I dont know them I hope you tested them as for your blu ray play people would tell you wait for profile 2.0 or buy a playstation 3 and I like the brand it a very good brand good luck
if I was you I would keep the old one if you dont buy a hd receiver and outdoor antenna because your off and on with sat. you get it for free it not that great but you can get more of hd during the off time with sat.
if I was you I would go with the Denon because of the watts they all have just about the same feature so with that the 100 watts per channel at 8 ohms is pretty good I have H/K avr 140 it feel like it has more power but not much more. all of them are nice systems but if you can test them out do...