First off how much money do you want to spend on your system? what kind of music do you lsiten to, mostly? form there we can build you a system. If your running Component spk's then you need x-overs, but if you run coaxial spk's then they have built in resisters so you really don't need x-overs. Emaill me and I'll help you figure out what you want and need to build a good sounding system.