I use a Ric Schultz-modified Behringer DEQ-2496. With the DAC, new analog output stage mod, linear power supply, new DAC chip and new clock mod would be about $1k, maybe less. Switchable between 96k and NOS. Selectable dither settings as well, not to mention a 10-band/channel digital parametric or graphic EQ. I have all but the clock mod, which I plan on in the near future. The sound is excellent.