After using my Roccat Kave 5.1 for a week, I find them very comfortable, very well built and verily formidable in gaming. They are good for movies, but cannot beat a 20$ Pioneer stereo headset in terms of pure sound quality when it comes to music. That is to be expected, considering it's a 5.1 headset, and considering that, the Roccat Kave is very good, much better than I expected. You don't even need much adjusting with the equalizer, if any adjusting at all.
Note that Roccat has just released the newer version, which is a bit improved but mostly the same.