"Heck all the PE's have added a sense of warmth so I'm not sure why I'd want a PE w/gold instead of silver,,, which is really all the PE III is."
The PE III has a little more to it than just gold wire

"Isn't 12 PE's enough anyways Alan?"
Nope....enough is when you find diminished returns....Just to give you an example, I presently have 19 (2 PE IV's, 1 PE III, 1 PE II, 12 PE (internal and external), and 1 super-Y (3 PE's in a Y configuration)) in my system and 10 scattered around the apartment (only 5 circuits available...1 bathroom, 2 per bedroom (total of 6...outlet and light), 3 kitchen). I still have not found the point of diminished returns.
Another one or two PE IV's in your system would be an excellent choice.