I would second Mike's recommendation of the DI/O. I have owned some high end DACs including the highly-regarded EVS Millennium DAC 1B and now use the ART DI/O. It fits well in my setup (Merlin VSM-M, Transcendent Sound OTL, Jeff Rowland Coherence preamp) even though it does not cost an arm and a leg (supposedly can be bought for $125 on the Net (www.fullcompass.com).
Do a search on DIO on Audio Asylum and you will see countless posts on it.
Do a search on DIO on Audio Asylum and you will see countless posts on it.