Take your very nice NAD D7050 and pair it with a Raspberry Pi + SPDIF hat (as described in many forum threads here) and run headless Plexamp on it. Some advantages over Chromecast:
- Gapless playback.
- Sweet fades.
- Loudness leveling.
- Equalizer.
- Bit-perfect playback.
- Can run independently (Chomecast want a sender connected).