So what are all the negatives to the Onkyo 606? I know they are supposed to run hot and some people have complained about a humming issue?? I plan on getting one from CC when they get closer to $325 and would like to know of any potential problems. The heat issue isn't a big deal for me as it will be on the top shelf of a component rack with open face/sides/half back. The humming does worry me a little but seems more like a defect than a common issue.