how does one decide on crossover point(s)? say for example you have a woofer that can do 40-6000 and a tweeter that does 2000-20000. looks like you could do it anyplace between 2000-6000. if both woofer and tweeter are nice 2000-6000 does it matter? how do you decide where to crossover? also besides frequency how do you pick order?

thanks, zonkers