Re:
having worked on all brands i can say Avid/sram models, the juicy/elixir/guide/level brakes all suck, if not at first then they do down the line, on average a set lasts about 2 years if maintained, the higher end models are better but still suffer down the line. i will admit there are good and bad sets and sometimes there's a really good one but more often than not they are an issue over a year old. wobbly levers, sticky pistons, and they don't retract very far so in muddier conditions wear through loads quicker than others as a result, and not the simplest to bleed compared to others.
i prefer Hope personally for one reason, every part is available from Hope, right down to the copper washers.
2nd preference is shimano, easy to bleed and pretty much don't go wrong unless you get a random dodgy set, pads available everywhere.
then magura, i stock them, have sold quite a few with no issues at all.
if you have alternatives then use them.