I think you are talking about the Ultrasone model? If so I would be very surprised that it is good. I have listened to the Ultrasone Edition 8 and 10 and I can not stand them, very harsh. I am not in a big hurry to add the Sig Pros to my audition list if it happens. More to come.
Ultrasone get a lot of hate, yet a lot of people love them too. Their high end models especially the Editions are overpriced for sure. But the Signature line (pros and DJs) are by the majority of accounts of people who've heard them, very very good. The SPs are supposed to be not as aggressive in the treble as ed8s and are quite neutral so I'm keen to hear them.
But there's no doubt that if the 7520s and Focal Pros sound almost as good or better depending on one's preferences, they're probably better value. The SigPros still seem to me to be the pinnacle of closed sealed, isolating, portable (foldup), rugged/durable headphones. Leather earpads which should last forever too.
Edited by designbykai - 11/28/13 at 6:17pm