Hey guys, I'm looking for some advice on my headphones problem. Long story short, I just bought some Shure SRH840's to replace my mid-level Sony noise canceling headphones. The Sony's had developed a buzz on certain frequencies that was incredibly annoying and made listening to music a frustrating activity. Anyway, after listening to the Shures for a couple minutes, I noticed that they too have a slight buzz. It's not nearly as bad as the Sony's were, but the Sony's got worse over time, and I assume the Shure's will do the same thing. I was listening to a CD through a computer at a medium volume. I'm very frustrated by this and am wounding if anyone has had a similar experience. I am hesitant to simply exchange them for a new pair because I did the same thing with the Sony's when I first got them, but the problem wasn't fixed. Is there another pair that you guys recommend that will no have any distortion. I feel that if I pay $150 for a pair of professional monitoring headphone that I shouldn't have to deal with distortion. Any advice I appreciated.