Yes,Sig Pros, got them the other day and they really shine with the Explorer.
In fact i am listing the Audeze 2's mk2 for sale!
Reading that the Microstreamer compares,poss beats the meridian is only the secondary reason to buy it cause the combo i have is Awsome!
The main reason to get it is the Idevice compatibility.
I'll post impressions here soon,
Think im getting the Ms tomorrow.
I really find Ultrasone Sig pro and mS DOES a perfect combo. ;) You should not be disappointed.