@OP. The choice in DSD ADCs is pretty limited. The Tascam DA-3000 could fit the bill. But you would need to A/B it against something like one of the two channel RME ADI Pro interfaces. If you are doing the conversion yourself, you might be surprised at the quality of a 24/96 recording. In terms of recording - as opposed to reproduction - the quality of the converters is more important than the encoding system