deluxe wersion of the marchand xm-9. excellent quality; it will be the *strongest* link in yer system, imho. not wery spendy, either.
I agree with the Marchand XM9 recommendation. I own this xover, and like its flexibility of adjustments. You can also change the xover freq. by easily swapping different "cards" yourself. Sonically it is very neutral. Be sure to order the deluxe version (better op-amps and connectors), and request stepped attenuators instead of potentiometers, for enhanced neutrality. I'd also suggest you have them assemble the unit, unless you're a real DIY, then you can spend the extra time listening to music. Must admit I haven't compared this to other xovers, but my system is pretty revealing, and the Marchand seems fine.