I'm using Memphis wire for mine ultra high strand counts (their 8guage has more wires in it then most 4guage) meaning it's safer for higher amp loads and it's super flexible blows that crappy scoshe or streetwires stuff out of the water. actually just pick up a memphis wire kit
Memphis Amplifier Wiring Kits | Car Amplifier Installation & Accessories | Car Audio/Video Installation & Accessories | Car Audio, Video, & GPS Navigation at Sonic Electronix