I considered several of the universal systems. If I did it myself I'd know the whole system a lot better. I probably spent the same amount as a regular universal harness but it was worth it to get the experience wiring a car.
The local guy that completely rewires cars said he would do the same thing for about $2,000!!!!!! And that is using crimp connectors!
We soldered ALL of the crimp connections so that oxidation won't be as much of an issue for corroding the wires. It took at least twice as long to solder everything but I think it was worth it.
I could do a similar wiring system to mount in the same place as the stock system. I just had extra space to mount it all by eleting the heater and fan. I put in an extra fuse block to allow me to add on some stuff in the future such as an EMS, extra gadgets and widgets, and maybe even a small ultra lightweight radio!
Thanks for the link on the polarizing film!