Have you considered the Sublime Audio K231 or their balanced version K235? Analog active 2- or 3-way crossover. I own the K231 and think it is a good value. I do not feel that it adds any significant coloration to the sound.
A Tale of Two Crossovers
I want to split the signal to my main speakers and subs. 50 - 90 Hz at 24 db/oct. My two choices are the Marchand Electronic Crossover XM66, or the Mini DSP SHD, which does its work in the digital realm, therefore needing an additional A/D-D/A conversion. Which one do you feel will do the least harm to the signal. All opinions welcome please.