If you have a ps audio preamp, why wouldn’t you go for the ps audio DS jr or DS sr dac? These dacs are far superior to the benchmarks in sq, Ethernet and i2s capability, and fpga based.
Have a look at the ASR review and measurements of the PS Audio DS DAC (linked below). FWIW, it ranks #10 from the bottom of 117 DACs reviewed. The Benchmark DAC3 ranks #11 from the top. Not that ASR is necessarily the last word in measurements, or that they measure the qualities that matter to YOU. The PS Audio products do get a lot of raves from owners. Personally, I like having ethernet as well as USB inputs.
Stereophile rates BOTH the Benchmark DAC3 HGC and the PS Audio DS as "A+" components. The PS Audio product is much more expensive (but used models have been widely available in the past).