Depending on the reason behind the change of spark plugs... if you are planning to make upgrades all around it is probably a good mod to do...

Iridium is a good choice cause its decently long lasting 20-30k miles for max performance, Copper is slightly better performing, but you have to change it everytime u change oil... its not worth doing...

Platinum is popular, because it is very long lasting 80k+ miles...

For an N/A crossfire going over Denso Iridium ik16s is probably pointless...