I wired an amp and sub this weekend. I bought the Rockford Fosgate amp wiring kit to install it. At first, I was miffed that I had to shell out $70 for it because it was the only one they had that fit my system (Best Buy). After getting out of the package and handling the wiring itself... this stuff is quality! The wiring is superb and the see through tube for the inline fuse is super cool (lets you see the fuse without taking it out).
It was a little more than I wanted to spend but I do endorse the fit and finish as well as the quality.