As someone who has a K50 incoming, I was a bit underwhelmed by the review, especially compared to Christiaan's review.
My streamer is a Linn Klimax DSM. I originally had a K40 ordered since the Linn is ethernet, but decided to upgrade to the K50 so I could try running it through my Trinnov Amethyst as well and see if will sound better than the KDSM.
I had an Innuos Statement in the house last weekend and connected it with Direct Ethernet into the Linn and it wasn't any better than the Small Green Computer i7 and Melco S-100 (with Farad Super3 power supply) I'm currently using - in fact, I found it a bit fatiguing, so back it went to the dealer.
Interesting thing about the Melco combo, Linn's position is their DS players aren't impacted one way or another by switches, etc., but the SQ took a definite step up (more slam, better bass definition while retaining all of the details) after I replaced the Melco's power supply. It was noticeable from the first notes played.
The K50 has been in customs purgatory this week in LA. Hopefully the damn thing will get out of customs and be on its way the first part of next week.
ChrisG