Sennheiser HD 580 or Ultrasone HFI-650? Just like the topic says. I need a good headphone for recording and mixing music, as well as wearing around listening to music. Both will cost me approx $200. Sennheiser HD 580 http://www.headphone.com/layout.php?topicID=3&subTopicID=26&productID=0020080580 Pros: Great reviews from everywhere. Sennheiser name. Comfortable Cons: Big headphones. Non-folding. Open. Ultrasone HFI-650's http://www.mercenary.com/ulhfi6le.html Pros: Folding. Smaller. Sealed. Cons: I've never personally heard of the company. Never tried on a pair. Anyone have any experience or thoughts on either of em? Thanks.