Here's what you are asking.
Platinum plugs do not last well in our waste spark ignition system. They get eaten alive and are lucky if they survive a month before you have issues.
Iridiums are what our cars shipped with and they'll do well with them, but the fine tip of the iridium heats up and can cause predetonation which comes through as KR and a loss of power. This is usually when you are on it hard. However they do last a long time.
Copper plugs: Pick whatever brand you like, in my opnion. A copper plug disipates the heat better and throws a fantastic spark in comparison to the other types. While it's a bit old school and you'll want to replace them every 50K miles or less, they will handle the boost and treat you the best overall.
