There's a whole bunch of buzz over the France-based totaldac
components designed by Vincent Brient. There are a few versions of their R2R DAC including the totaldac d1-dual DAC (€9,900), totaldac d1-tube DAC (€6,960), and the d1-single DAC (€6,960). All of the versions can handle up 24/192 via asynchronous USB, Coax S/PDIF (BNC), and AES/EBU inputs, and 24/96 via Toslink. There's an integrated volume control as well as an adjustable 12dB/oct high pass filter and a 69-bit 2 or 3-way active crossover for taming your system's sound in-room. I encourage you to read more about totaldac on their website but from the bit I heard, I'd certainly like to hear more.