well; it's about time to change my spark plugs. i was wondering which ones i should get? i searched back, and seems like everyone suggests coppercores, but they're one step colder, aren't they? right now, i'm basically stock with a shortram intake and a cat-back. should i stick with just regular OEM spark plugs, or go with somfin else? also, i run my car a lot up and down the local mountain roads here, so should i go with different plugs to accommodate the constant running?