I currently use Sennheiser HD558's. They are plugged into my motherboard (gigabyte sniper M3) which uses a built in Creative CA0132 chip.
I have installed foobar2000 and swapped all my mp3 music for flac format.
How much difference in sound quality would there be if i were to buy a external dac/amp?
Is something like the xonar u7 or Fiio e17 suitable or should i splash out on something like Meridian Explorer or EHP-O2D? Are they really worth the higher cost?
I'm not very clued up on audio hardware so any help will be great.