For the best sounding, I strongly suggest other users to use Wireless connection. I used wired for almost 8 month and Auralic informed me to try wireless. I was reluctant and ignorant.
But one day, I changed that and OMG..I regretted why I didn't listen to them earlier.
For other upgrade, try replacing its linear power supply. I am using hoer-wege PS which I find, amazing product. It goes hand in hand with Auralic Aries.