I would try the 218 as a processor using the analog L and R output to a stereo power amp to the ESL63. Then get a QNAP and install Sooloos. You will get Full MQA.
If you are a stereo guy you do not need anything else. You can connect a Turntable also.

218, AC12, DSP6000 24/96LR, 4K AppleTV, Sony blu-ray player (BDP S570) and
QNAP TS-251 and a Mac Book Pro (mid 2012), an Intel Nuc8ieBEH
Technics SP10MK2 with Technics EPA100MK2 tone arm and PS Audio Phonolink Preamplfier