Has anyone tried the new Beyerdynamic DT1770s? I love my DT770s, but they are to be honest, too flawed for my ears. But they isolate well, which is actually a more important criteria for work, as we are about to move to tighter quarters. Anything else that isolates as well? The Leatherheads are a little too expensive for both the workplace and the public transport commute, and IEMs aren't comfortable for extended listening.