You have a very good reason to be exited.
I don't know how to say it as English is not my native language, but after 3 day of breaking the phones and/or me in, they finally hit me hard on playing some classical music on them. Ipod LOD>Meier Audio Stepdance@ 12 volt(from ENERGIZER XP8000)>Ultrasone Signature PRO. Perfect sound, bass mids and treble in total harmony. Very good soundstage very good instrument separation, very dynamic no harsh treble at all. Bass is very good controlled but also very strong without being pronounced. So the mids and highs are not overshadowed by it. I hope that was understandable enough...
As you might feel from my words the cans are the best I had the pleasure of listening to.
Same opinion here . I've now he-400 besides my Sig-pro . Good can too but SP still keep the leadership. This headphone do everything well. I didn't find any music in my collection which sounded bad with the SP. he-400 is more airy , with undoubtly a bigger soundstage and more clarity. but to my ears SP is always right in the way it provides the music. if we add the fact , SP sounds good from anything without any specific and expensive amplification, I think we have one of the best offer in the market.
About SP look , i'm really fan. No lies or bluff. it's a tool to enjoy the music not an item you keep on top of your fireplace. you put it on your head, silence comes, you take a breath and then you turn the music on and pleasure comes !