PinkyPowers
Reviewer: The Headphone List
Even the lowly AK100ii sounds noticeably better than the X5/DX90 (to my ears anyway).
It's a much bigger upgrade than people say on these boards.
I haven't heard the 100ii, but I can certainly say the 120ii is an enormous leap over the X5. I'm reviewing the Cayin N5 right now, and it also doesn't hold a candle to AK.