So what would you say about the C421 - Black edition with a bass boost?
Anyway, I am extremely interested in the ODAC and O2.
I think I'll buy them as separates because the ODAC/O2 combo does not have a LINE-LEVEL OUT (unless you mod it yourself).
(I'd prefer them in one case but with a LINE-LEVEL OUT, if it's possible. Just like the iBasso D12, etc,...).
Also, I'd like the 1/4" headphone jack which is more robust than the 1/8" one. I hope that JDS Labs can provide the 1/4" headphone jack/output.
Finally, should I go for RCA outputs? What portable/trasportable headphone amps or DAC/amp combos under $300 require or accept RCA inputs?