Topping has announced DX3 Pro, DAC + headphone amp with Bluetooth input (ACC & APTX-HD).
DAC is using 2x AKM 4493 and the headamp output stage uses OPA1612 and pumps out 1W of power. No more 10 ohm output impedance :)
Overall, looks promising.
http://en.tpdz.net/news_detail/newsId=85.html