Given my experience with the ERC-3 I thought a lot of people were making a mountain out of a molehill regarding the noisy transport. To that I should also add in all fairness the ERC-4 can be significantly quieter but on some disc most of the time but for what ever reason I can still hear some chattering/noise with the ERC-4 on a few but not all disc which is easily remedied by hitting the stop button, then play again. Alternatively one can eject the tray, then close again and this will fix any noise.
In conclusion the audio performance of this player is equal to if not better than my Holo Spring DAC Level 1 using Aurdirvana + 3.5. They sound different but after a few weeks of comparing I tend to lean toward the ERC-4 which sounds more pleasing to me. Its very dynamic spacious and smooth. Highly recommended.