I’d say keep the MA3 for DAC/streaming, and get the 330 without the DAC option. The 330 does not have built-in streaming capability with the DAC option.
I’ve looked at the Meitner, to use as a DAC/preamp/streamer, since it has volume control. It is Roon ready, iirc. "Connect to high resolution streaming services like TIDAL, QOBUZ plus support for popular music services like SPOTIFY, DEEZER, vTUNER etc. UPnP/DLNA support for network and NAS file playback, ROON READY and ROON ENDPOINT functionality plus direct USB audio file playback." https://www.emmlabs.com/ma3.php
The 330 w/DAC doesn’t have streaming capability. "As befits a classic integrated, the Soulution 330 comes standard with preamplifier and power amplifier sections; as noted, a phono board and/or DAC section are also available as separate options at additional cost ($3500 for the phono, $4800 for the DAC)"