I think the HiFi-Skÿn (and a few other products using the 4490 off-shelf chip) have taken the D/S sound as far as it can go, at reasonable cost. That is, in my opinion, I don’t think there is much further sound quality to be gained from off-shelf products until you spend $2000 or more. The HiFi-Skÿn is the sweet spot. The HiFi-Skÿn is quite good, and quite worth its cost by that relative comparison.
see: Mobdro Vidmate
see: Mobdro Vidmate