I'm currently shopping for an amp wiring kit.
I've decided to go with knukonceptz, mainly because I bought some stuff there for my home theater and liked the products. And they've got good prices

The amp will be a Pioneer PRS-D3000SPL (Pioneer Link) and the subwoofer will be a Pioneer TS-W3002SPL (Pioneer Link)

RMS wattage = 500W

I can't decide if I should get knukonceptz' cheapest kit (KLM-K4 Link) or their most expensive one (KFX-AK4 Link)
The first one is the copper coated aluminum (Max 100A) while the other one is pure copper (Max 150A).

Since I'm not running any monster setups with only 500W, and at only half of the amp's power capacity so only using below 50A, which one should I pick?