Hello, I bought HD598 because I believed it would sound much much better than my 1 year old PX100ii. I've been actively using PX100ii over 500 hours and it sounds fantastic. But HD598 with 48 hour burn in is definitely "listenable", but the sound just can't beat PX100ii. Even though the sound is much "wider" (which I believe it's because it's way expensive), but the actual sound is like... it's hard to explain but it has "undeveloped" sound. I don't know. The PX100ii sounds much more "realistic" and appealing.
So... does burned in HD598 really sound better that burned in PX100ii? Because I'm in little bit of doubt right now.. Maybe I should keep it playing various music for 500 hours :)