I tried those HD598s in this exact sale, was not impressed at all honestly. FLAC and 320 kbps music from my PC sounded muddy, bass was hollow and airy, they leaked sound like it was a speaker, and like I saw some people say, they just sound "boring" like nothing stands out about them other than the appearance.
Muddy? g'damn lol. maybe you should save up for a pair of flagships or something, your standards might be higher than your budget.