Currently, I have a Yamaha HTR-5240 receiver. I've had it for over four years. I've been happy with it, but I want to move up to a higher sound quality ---the use is strictly for movies - DVDs, etc. I was looking at the Yamaha HTR-5790 or 5760. Anything else that I should look at? Again, I'm looking for a nice jump from where I am at right now with audio quality. I'm not concerned about gimmicks and functions, etc. --- just pure sound quality.