I've got a budget of about $600 and want to get the best sounding receiver I can. I use it mostly for movies and video games. What do you all recommend? I've been looking mostly at the HK AVR 525 (some sites are selling it for just over $600), but is there something better? Also, I currently have an Kenwood KR-V7070 w/5.1 surround. If I'm only willing to spend about $600 to upgrade it will I hear enough improvement to make it worth while or should I wait until I have a little more cash? Thanks for the help.