@sagur80 Just to be clear, I own the Aavik U-280 which is basically I-280 and D-280 in a single chassis. I’ve never heard the Aqua La Scala so not sure if I can offer my opinion when it comes to that particular dac.
When compared to Denafrips Terminator 2 and Plus, I preferred the Aavik DAC by quite some margin. It brings out more detail and has better instrument separation and transparency, i.e. I feel that I can see deeper into the music and the instruments and singer just sound a little more fleshed out and real. The Denafrips Terminator Plus tended to sound more hifi’ish but I can see how some might actually prefer that type of presentation.
Compared to the T+A DAC, the differences are much more subtle. I thought the T+A DAC had a little more air and the treble region was slightly better than the Aavik DAC. But, to my ears, the Aavik has a bit more weight and oomph. It allows the notes to linger in the air just a little bit longer. It kinda paints the music with a broader brush, compared to the more chisel-like character of the T+A. Also, it tends to present the music in a bolder fashion. I can see how this might sound a bit ’over animated’ to some. For me, this is actually a quality that in the end made me choose the Aavik. The other thing that might have affected my decision is perhaps better synergy between the Aavik amplifier and DAC. It is quite possible that T+A might sound better with a difference mix of components.
The D-280 is almost twice as expensive as the D-180 and from what I hear the primary differences lie in two key aspects: more transparency and a more organic (smooth) sound compared to the I-180. But I’ve not owned the 180, so feel free to take my opinion with a grain of salt.