my choice has been to get a used ARC pre-amp
DACs evolve at a rapid rate but a good pre-amp will last years before a really significant upgrade in SQ comes along, so will be very cost effective to do the DAC every couple or few years
there is a new USB DAC out now that claims to have solved the galvanic isolation problem (iFI IIRC) and it is quite cheap
then there is your source material - even w/o going past the redbook std. there are huge improvements to be made from re-releases of any CDs you have from the early to mid-1980s
DACs evolve at a rapid rate but a good pre-amp will last years before a really significant upgrade in SQ comes along, so will be very cost effective to do the DAC every couple or few years
there is a new USB DAC out now that claims to have solved the galvanic isolation problem (iFI IIRC) and it is quite cheap
then there is your source material - even w/o going past the redbook std. there are huge improvements to be made from re-releases of any CDs you have from the early to mid-1980s