I don't know why everyone likes Harman Kardon receiver? I had a avr-635 and it seemed great. It sounded good for movies, had the latest fefatures, and the automatic setup made a difference with my speakers. Then, I got the uprade bug and got the avr-645. Worst receiver choice ever! This is when HD-DVD plapyers were just out. Right out of the box, it did not work with the hd-dvd player and that is why I upgraded to it. I was sent an AVR-745 from harman kardon for the trouble I was having with my original avr-635 and that went bad too. It had a new video processing htat allowed the hd player to work and decoded the true hd. It came with the harmony remote and had an extra sub prot that the auto setup would even recognize. I thought this was my last receiver. One day, this brand new receiver kept shutting off. I traced it back to the center channel port on the recier. Wires and speaker were fine so something was shorting out in the receiver. When playing logic 7, the sub box on the receiver does not light up. People on forums said they used the DVE and found that it was not playing something. The firmware was taken off the website that they had on there for a while becasue of bugs. Why do people like a receiver that cannot decode sound right(logic 7 problem), has many quality control issues(mine broke in 5 months and look at all the referbs out there), and right out of the box the avr-645 you could not use the hdmi for video with an hd dvd palyer. The answer from support about the avr-645 was it was old and I should have gotten one of their lower models because it was produced later. The onkyo 805 is what I got to replace the AVR-745. No problems at all. Decodes the sound right, and even has the new true hd and dts ma formats. The remote is easier to use than that harmony remote. I guess if you wanted a harman kardon recier, it would not be bad to get the avr-635, but don't get one with hdmi and all the problems. Not many other receivers have logic 7, and it cannot decode it right.