I am using an active xo, and while I hesitated for a long while because of the digital processing involved, which rang so much as heressy within my preconceived notions, I am not going back. I'm still learning and perfecting the implementation - still haven't time-aligned my 4-way - yet it still sounds so much better. And in my case the setup is cheaper than the 2-channel I was running before.
DEQX, from what I read, is an excellent unit. If your only source is digital, then there are cheaper options that are more involved but also more flexible.