Might throw in the Peachtree iDAC. ESS 9016 Sabre implementation. Compared well with other $1K DACS of that day. Can be found for <$500. Is an upsampling DAC
They also made the Sona DAC/Pre that was a 9018 and did DSD. Dont know what those go for used though
They also made the Sona DAC/Pre that was a 9018 and did DSD. Dont know what those go for used though