So after so long being a DT990 fan, I was loaned from a good friend his HD 598. We ended up doing a trade because I fell in love with their mid-range and sound stage. They don't go as far to have that low bass, but for most of the music I listen to, these took the cake. I am looking at upgrading my amplifier to the Bottlehead Crack which I think would pair great with the HD 598.
Any who, I am now supporter of this brilliant headphone.