601 is NOS (vintage) sound.
X19HD is very cool, only an average DAC chip.
Rocoo P, average DAC chip.
Colorfly CK4, flagship Cirrus Logic DAC chip. I'm disappointed they didn't respond to my email though, and there could be clones out there.
The DAC chip is the soul of a device, the amplifer section the clothing.
Edited by kiteki - 7/12/12 at 7:04am