Don't get either, there is another option. I've got a brand new custom built PC that I buolt myself with a top of the range on board soundcard and it's rubish. How do I know that? I've got a DAC Magic and I can switch between the onboard sound and the DACMagic. The on board sound sounds like the music is playing inside a cardboard box. My amp is a 20 year old Sony, which I'm replacing with an Arcam A18 next week. If I can tell the difference with a cheap 20 year old amp, with headphones you'll notice wolrd of difference. If you plan to continue to use headphones try an ASUS XONAR soundcard which is about half the price of a rDAC and has a very good headphone amp built in. I thought about buying one but went for the DACMagic as I use speakers. If I used headphones then I would have bought a XONAR instead. If you get an amp at a later date, you'll still get very good sound from it. Make sure you get the right version as one fits standard PCI slots and the other fits a PCI express. You can put the money you save towards a nice pair of headphones. Good luck and enjoy.