I think you'd do well to focus on some of the R2R NOS DACs out there now. Many people find them to sound less harsh or more natural sounding, while others will say they're rolled off in the highs. Whatever. I just think they'd suit your tastes. The previously-mentioned Metrum Onyx would possibly be a great choice, and it reputedly comes very close in sound quality to their flagship DAC. Another one to look at would be the SW1X DAC. The great thing about this one is they offer an in-home trial period, and owners have been giving them glowing reviews for both sound and customer service. Hard to see going wrong with either of these excellent DACs, and best of luck in your search.