Well, I really don't know if the sound card in my motherboard is any good. If I install the official drivers there is a serious channel imbalance (the right channel is a lot more silent) and I also had problems on the left channel distorting. I want to believe you guys the sound card is good, but I was always told the onboard sound cards are always pretty bad. Would you say the DAC in my Simple Audio Listen speakers is better? There is however a constant hiss when I use the USB DAC of the speakers.
That's quite expensive and unfortunately there is no line-out/pre-out on the amp.
Sometimes I ask myself why they make amps that powerful. I think there should be a way to limit the volume on all headphone amps, so you can't damage your ears. Anayway, maybe I will be buying a Sennheiser HD700 (edit: or maybe not, some reviews seem to be bad) in the future if there is a good deal on them. I have heard they are pretty good and popular, what DAC and amp would you recommend for that? Schiit Stack again? Is there something the Schiit Stack isn't good for?
If I know what the state of the product is and there is still some warranty on it, I have no problem in buying used stuff. The difficult part however is finding it in Europe (to avaid crazy high import taxes).