My advice is to make some sacrifices, maybe don't go out for 3-4 weekends, save some money & go for TH-900. Although I haven't heard TH-600 it has been my experience that it is that 10% improvement which is the thin line between having very good sound vs. having an Eargasm. After all that is why we are here (on Head-Fi) - for chasing the ultimate sound.
Edit (Sorry forgot this is Sig DJ thread) - & please also buy the Sig DJ's so you will have the best of both world's.
Edited by punit - 5/4/14 at 1:27am