For Audio? Presonus, as it is first-rate under Linux - it just plain works (at least in Ubuntu Studio). Also have other ADDA's too, such as RME .. same result: just works under Linux. Best latency stats of any DAW setup.
Thanks! That's great to hear. When I was working with audio, I had a good experience with the E-Mu devices, but everything else what iffy, e.g. TC Electronic or Focusrite that I otherwise love.