Biwire speaker cable advice, please

I have Luminous Audio Technolgy Prestige 6' external biwires that sound pretty good, though I've tried no others yet. Budget is ~500 or less, used is fine, I can use spades or bananas. I could braid some CAT 5 on the cheap, but a finished cable would be easier on the old digits. The current rig:

G&D Ref 1 xport, Genesis Lens, Timbre TT1 dac, Electrocompaniet 4.7 pre, Bel Canto Celio [50 watt Class A solid state] amp, Impact Technology Ventos.

In advance, many thanks to all for your good counsel.