I've heard great things about the Bryston crossover. I've used an Audio Research unit with Maggies and it worked very well although if tapped or moved would send microphonics through your system.
Electronic crossover recommendations
I need some help finding the best electronic crossover. I am looking to experiment with going active to a few different speakers. I am going to use it on commercial speakers, and some DIY speakers. I need it to be able to be used on ANY 2 or 3 way speaker. Flexibility is really important. I am really looking for only top notch ones. I keep hearing that active is the way to go, so I thought I would give it a try. If you have used one or know of one, I would appreciate it if you can drop a line or two about it. thanks