I've long had HD580s as my main headphones, and I like them a lot, but I have a feeling that, over time, they've lost their sparkle. The high end sounds pretty laid back, and I'm not enjoying listening with them as much as I used to.
I'm wondering if it's worth going to HD650s. Is the sound similar? As I understand, the HD650 is a more recent and better can than the HD580.
(FWIW, most of the music I listen on good headphones is classical, but also a fair amount of Grateful Dead.)
The problem for me, when buying headphones, is that I live in a village in the French Alps, several hours from any city where I'd find a dealer to be able to try out different headphones. I like the Sennheiser sound, and I'm tempted to go for the upgrade, rather than explore the many other brands and models in the same price range.
Any advice would be appreciated. Thanks.