Moonsand1FiiO M11 is just another chi-fi DAP with many competitions like HiBy, iBasso, etc more less offering the same thing.. And there's always Astell & Kern (Korean brand) which will beat all these with latest "of the shelf" chips & high specs.. But on the side of the spectrum, it's just Sony with its in-house chip, DAC, etc - where only its TOTL & newer models can beat ZX300...