Essentially, the two DAC's are very close. The BiFrost future proof you if Schiit ever comes out with a new USB card. So, if used DLIII+sound card should be pretty close to a new BiFrost, In that case, get the BiFrost. I won't even get into the DLIII up sampling. If you're a purist, bits in = bits out, then BiFrost. The DLIII processes to a minimum 96K. We could go on an on and debate pure bits versus up sampling, neutral versus a little warn but in the end, if there's <$100 difference, I'd do the Bifrost. Don't get me wrong, I'm keeping my DLIII in my main system and would love it in my desktop system, but in the end, for anything <= CD quality, there's probably not much of a difference. I have some 24/96 from HDTracks and am really not all that impressed.. i.e. no huge improvement (but that's just me). I already talked about the minor differences in SQ. You could tune with tubes on the Lyr and realize much more of a difference. Whew!
Bifrost is $450 with usb, and DLIII is $500 new one, and used one is around $400. As you know, DLIII usb isn't as good as Bifrost usb. The problem is my computer doesn't have SPDIF output, so i have to buy sound card if i'd get DLIII. Setting DLIII with sound card should support SPDIF is better sound than Bifrost??? Choosing DAC drives me crazy!!!!