I have recently build a new PC and have bought a dedicated sound (Asus Xonar DX), however after doing some reading and watching the following youtube video (http://www.youtube.com/watch?v=d1rXcJuEsy0 - Gaming Audio Myths: Avoid The BS & Save Your Audio Life), is there any point to having a dedicated sound card as according to the video they typically have a much higher output impedance than a DAC + AMP combination?
I currently have two headphones: Sennheiser PC360 (50 ohms impedance) and I have just ordered the Philips Fidelio X1 (which has an output impedance of approx 30-36 ohms). Would my current setup be enough to get the best out of the above headphones or should I be looking to get an DAC + AMP? (for example: FiiO Olympus E10)
Any advise/comments would be appreciated as I'm bit confused whether my audio setup is adequate to power these headphones or whether I've just wasted money. I'm basically looking to have a good all round audio setup, without spending a huge chunk of money.