Denon DCD-1700NE is a step in the right direction, it handles DSD up 5.6MHZ (DSD128) and CD format versatility is an absolute plus. All my surround 7:1 amplification setups have been Denon and I am partial to the brand, love the quality.
I use Auna Jukebox DAC, it plays almost every audio codec under the sun, DSD512 (22MHZ) included and sounds mighty fine feeding into my Denon and Monitor Audio/Dali/Q speakers. It dispenses with the optical discs, you can access your music files via the external SSD, SDs, USB drives.
It would be nice if the Denon made use of USB port (I stand corrected if it already has one), making it universal platform which will broaden it's appeal.