New Schiit Jotunheim has just been released. At its $399 base point price you receive a balanced (+ single ended) headphone amp that can properly and well power everything from the most sensitive IEM's to the HE-6. At $499 you can add a DAC or passive phono stage.
See:
http://www.head-fi.org/t/818323/schiit-jotunheim-review-preview-head-fi-tv
and
http://schiit.com/products/jotunheim
See:
http://www.head-fi.org/t/818323/schiit-jotunheim-review-preview-head-fi-tv
and
http://schiit.com/products/jotunheim