First time getting a decent headphone here. I've been looking for amps, since people say that sound cards are a bad choice. I heard that tube amps make the sound a lot warmer and can reduce the treble. So I found the Schiit Vali 2, it does not look to complicated of a tube amp, and I can later buy the Modi 2 to go with it. So will it go well with the 990? I'm a little worried of that treble will bother me, so I'm hoping this will be a good solution. Thanks.