I have read countless reviews and threads about the harman Kardon avr1600 and the onkyo ht-rc260. I also am considering the denon avr791. Which one to buy with consideration on sound quality for both movies and music. I already own a HK avr 146 and HK avr525 but I want to step into the world of hd audio. Please help as all the reading has me not knowing which is the best for me. I am using polk audio's(rti10's, csia4,pws125 sub,rm101's at rear).