What is nice about the Neo 10 and 3 is that they do not need any equalization or compensation. So simple 12 db per octave xovers will work silly good. My active crossover will be fixed at 12 db per octave. You would set the levels between the amps with a single shunt resistor (no pots). The only things in series with the signal are two zero feedback fet buffers and a few state of the art caps and resistors to do the filtering.....incredibly simple and miles ahead of DEQX or such. This active xover would be for the mids and highs. The bass xover is done in the servo amps. Just a cap in series with the mid amplifier (or on the output of the active xover) would limit the lows going into the midrange (if needed). If you are not listening that loud then you can run the Neo 10s wide open (am doing this right now with a single Neo 10 on an open baffle.....however, not recommended for super loud listening....in fact it will sound better with the cap in series when playing very loud).
What is nice about the Minidsp and the better sounding (but still not seriously good sounding) DEQX is that they are so versatile...you can use any slope of xover, tons of eq, time align, etc. If your speaker needs equalization and such then they are fine...but don't expect you will hear every tiny micro vibration and thrilling harmonic shadings coming through these things when they are loaded with opamps, normal resistors, caps, power supplies, ADCs, DACs, cabling, connectors, etc. Even my modified Behringer (good enough for serious high end!) will not be as transparent as my simple active xover. If you can just use the digital thang in the bass and use either simple passive or active on the mids and highs...you have something really seriously transparent. Using eq on the bass will let you tune your speaker to the room.....mucho cleaner sound with eq below 2-300 hz.