I have the Danville Signal dspNexus 2x8 with the AK4499EX DAC's. It far surpasses the sound quality of my DEQX 2.6p system I had used before.
At this point it is running a pair of Magnepan 1.7 planars as a 3-way DSP crossover with 2x12 OB servo subs.
Tom Perazella replaced his DEQX Express II with a dspNexus 2x8 with the AK4493 DAC's with his Egg's and he is very happy with the system.
DSP Concepts Audio Weaver is the development software that is used with the system and comes with a license with each system.