Thank you everyone for your replies. They shed a lot more light into this Amp/DAC problem, now. I'll play a few songs with different devices (PC, MP3, CD player and phone) to see the difference in SQ and to tell if I should purchase DAC.   If there is a big difference, what do you think...

Hello fellow members of Head-fi.   This topic probably doesn't entirely belong in this sub-forum, but I found creating one topic asking everything more useful than spamming other sub-forums aswell.   So, first of all, let me tell you I'm a complete noob considering high-end audio. Until...