I´ve started thinking about maybe upgrading to a balanced output DAP... Currently using a Sony Walkman A35 and I´m really liking its clear and dynamic sound signature. Coming from that my first thought was the ZX300, but obviously this DAP is its main competitor. Asked the same in the Sony thread, but has anyone had the chance to do a in depth comparison between it and the new A&K AK70 mkII? Preferably with IEMs, not full size headphones. Done a lot of googling and can´t seem to find any yet. Since they are both brand new and in the same price range I´d guess a lot of people will be choosing between them. I might be able to test the Sony DAP at a local store here, but the A&K DAP is only available online so I´d have to buy it blind. + JamesAnthony: Are you using a balanced cable for the HD 650? Looking at the official specifications the maximum output level single ended in the AK 70 mklI seems a bit lower in the new version (2.0 Vrms vs. 2.3 Vrms), but there´s a big increase with balanced output (4.0 Vrms vs. 2.3 Vrms).