@davetheoilguy Lumin has a slightly more detailed/analytical sound, so you should be looking potentially at more harmonically rich DACs. I am an authorized T+A dealer, so take this with a grain of salt, but if you’re looking at the DCS Vivaldi Apex, one unit to consider is the T+A PSD 3100 HV. It does have the preamp built in as well, but for MSRP $22K, the quality of its DAC nears the $39K reference SDV 3100 HV. T+A HV Series DACs are well known for their harmonics and organic presentation and are denser/richer with improved effortlessness, decay and air compared to their renowned DAC 200.
Other DAC brands to consider may be EMM and MSB.