1) You are absolutely right, for "almost" a stock setup like mine copper plugs are the best...
2) Since I live in Canada and I don't have access to a garage, I preferred using Iridium since they will last way longer
3) How did you do it under 10 mins? I bought my car used and I changed them when the car reached about 40K...They were completely jammed inside the metal retainers and the wires broke in my hands...It took me around 2 hours just to do the three in the back...any tips or tricks for my next spark plug change?
Thanks