Using different speaker cables might work, but there are minor differences in the impedance and inductance, which may or may not blend well together. By using the same manufacturer and same length, you can be certain that you are not introducing minor frequncy and phase changes into the crossover. I use double runs of Tara Ref Gen 2+, soon to be upgraded to Air, and have found the HF control to be quite smooth, natural and extended... after break-in of course. By experimenting, you may eventually discover a magic combination of 3 different cables, but whatever you do, try before you buy.
