OK - so you are going to go from the PC into the DAC and then into the receiver? Cool - that makes sense. The Schitt is a nice little unit, or if you want something a bit less expensive, you could try a Fiio E10 (it has both a DAC line out and a HP out), or if you just want to see if an external DAC really makes any difference, there's always the UCA202:
Since you are using a receiver - does the receiver have digital inputs (Coax or IR)? If yes, then another option for you is to get a USB DAC that has a digital output. The Fiio E10 has a coax output and the UCA-202 has an IR output. Send that into your receiver and then let the receiver handle it from there. I have no idea if that would be better or worse than sending analog into the receiver.
lol - I thought i was wrong, but i was actually correct.Edited by billybob_jcv - 1/5/14 at 9:50pm