I don't understand: I thought the whole point of modern SS amps was to reduce output impedance and power consumption and ultimately to affect the sound as little as possible. If you need a tube amp to tame the highs of a particular headphone (because the unaltered sound as the developers intended would be too harsh), doesn't that mean that you should just get a different headphone? I can see how a tube amp can a) subtract sound through impedance and b) colour sound... but what can it positively contribute?
Not meaning to be judgemental at all, I'm just confused what they add over SS amps.
Why should accurate uncolouring digital conversion make the sound less real?
Yes.
OK so in summary, if I want to listen to game audio from a PS3/PS4 and music from PC, what do I need?
From PS3: no USB audio output, so no DAC, and a Magni/Vali doesn't have optical input (why on earth not) so I have to use component wires (is that lower quality than optical?).
For PS4: is a DAC and amp a good idea there?
For PC: even if you guys like sound cards, if I use a DAC + amp then I don't need a sound card, right? So why do people use sound cards (even if it is superior to onboard audio, is it superior to DAC+amp)?