Ultrasone Edition 5 Unlimited needs some serious burning-in. They sound horrible at the beginning but after about 30-40 hrs they are getting better and better - very open (doesn't sound like closed HP at all), airy with separation I've never heard before (comparing to LCD-XC and even HD800). Unlike HD800 they are very musical despite being analytical. Because of the fantastic separation the soundstage seems enormous, vocals are very natural, highs clear but not overly sharp, bass very deep but controlled. End of the road HP.