Maybe you can hear the difference so that its important for you to have a $700 - $1600 crossover. Or maybe you need the bragging rights to have that expensive a crossover.I have a lowly Rane AC23 24 db/oct analog crossover. Works great.
Do what you have the money for, but if you aren't made out of money you can go lots cheaper, and I'm betting unless you have platinum ears, you won't be able to tell the difference side by side.
Marlboro