The streamer in the MA3 is not endgame, and the Aurender N150 is likely better than it. That said, you will also have a hard time getting smooth analog sound from the Aurender N150. The N200 will sound more robust as a streamer with a bit more tonal density, lower noise floor, and larger soundstage. That said, the N20 is really where you can leave $20-30K vinyl front ends behind. I am an Aurender dealer and have compared these units.
As far as the DAC section goes, the MA3 is pretty good. It gets toward the analog sound and retains better control at the frequency extremes, at least when I demoed it against the Baltic 3. I wasn't aware there is now a Baltic 4. With the Baltic 3, I got very 'analog' sounding digital, but I couldn't live with the loss of control in the bass and the rounded highs which took away from the size of the soundstage and effects toward holography - and I was experimenting with excellent tube choices. I ended up returning the Baltic after not having a great experience with it. Ultimately, I went with T+A. I loved it so much, I ended up becoming a dealer for them.