figured I'd bump this thread as I bought a new headphone (pictured on left). Sennheiser HD600. Wow, being properly amplified they are a gem. I've heard the HD650 before and I'm convinced the HD600 are a superior can for overall sound quality. I'm enjoying them more than my flagship Denon's at the moment. There is definitely a sonic difference in hearing an open (HD600) versus a closed (AH-D7000) headphone so I can get both spectrums depending on my mood. The Denon's are epic for bass heavy beats but for live performances and the like ya can't beat the Sennheiser's. Note to self...don't take a photo at night with a point & shoot...hard to get the detail but you get the idea.