System synergy is key and you never know what's actually going to deliver what you're looking for. Relationships are priceless in this hobby. Take advantage of your relationships and demo everything that you can! I might demo the D50 in the coming weeks to see how it sounds in my system. I'll try and remember to check back in.
Keep in mind that the type of connection between the digital source and DAC can make a big difference. I always try different connections when demoing. Good luck.