I'm new to this and would greatly appreciate some help. I'm looking to buy a new receiver. I will not be using surround sound for the time being but I would like to at least make use of 2 speakers for better stereo tv sound. I'll be using these same speakers (Polk RC80i) for music. I have a 60" Panasonic GT50. Receiver must handle 3D. Models I'm considering: Onkyo TX-NR616 or 515 Marantz SR5006 or 6006 Yamaha RX-A720 All of these are more then I currently need but I want a quality receiver and one that will keep me from buying another one 2 years from now. The best value might be the Onkyo... newegg has the 616 for $409 and the 515 for $372.