Hello there.
I have been reading a lot about Ecler Nuo (2.0, 3.0, 4.0) mixers, and they seems to be a good choice. The 'only' problem that seems to have (i repeat, i don't have it, just what i have read about on reviews, personal opinions, etc...), is that send / return function don't work as intendeed, and you need to mess with channel / fx gains...but all the rest seems to be really good.
At the moment, i have an urei 1601 (2 channels mixer, i'm really happy with it, but its getting older and i'm in need of more channels), and have been thinking (and saving lol) a lot about wich mixer should i choose.
On the other hand, i have used an American Audio MX 1400 (no DSP), and i think it's a really good mixer. 4 channels (with individial output meter), 3 phono, 4 line, 2 mic, each input can be assignable to every channel...). I have been searching it in my country but i didn't found any place that they still sell it. It's fairly cheap (200-250 eur), but hard to find, and tbh i don't know how long it's going to long, or if it have bad parts etc...I would like to own one tbh.
You can also try Urei 1603 series (Soundcraft), they have 4 channels, they are not very expensive, but they are out of stock (second hand). They are tanks.
Regards.