haha i cannot join. seems i have some private TT session with some of close audiophile friend. =P

sennheiser HD580/HD600/HD650 can't audit like 1/2 hours imho.
they are very laid back. and not exciting, on first listen you might feel it doesn't worth the money at all. but give it some time, u will really amazed by it's micro detail. i kena poison last two weeks by my own HD580 which i already bought for more than 4 months..
i feel not worth it on my first purchase. then after that, i give it some time, and i listen again, it's really sweet sounding headphone. and everything is well define.