@furballs_dc:

Keep it simple: where available, use good, ol' fashioned copper-core spark plus, especially with forced induction.

Copper is a better conductor (of both heat and electricity) than fine-wire rare-earth metal cored plugs; they last about 1/2 of iridium, yet also cost 1/2 as much so if you change them yourself you break-even, and yer ride will be happier for it.