I've heard a lot of great things about the Alpha Dogs and my short term impressions were that they are neutral and detailed in the highs while sounding very natural. Also they sound open which is unheard of for most closed cans. The mids sound fantastic and I need more time evaluating them again but they are unmatched IMO for $600. A pretty penny for some headphones but 6Moons audio talked about how they even outmatched the Audeze LCD2.2 in some areas.
EDIT: And they isolate :]