Best spark plug?
 

Which spark plug do you prefer? Ive been using AC Delco Rapid Fires and have liked them, but maybe there are better plugs? Any experiences/opinions are welcome!

I forgot to mention-I have a 2.0L 4-cyl engine with dual 44mm Webers and high lift cam.

The only thing I really want from a spark plug is a spark every time its told. The power of the spark isn't that important to me, so I don't care about the coil, and the splitfire plugs do very little. So, I choose Bosche or Champion plugs.

There have been a number of strings on this topic over the years and it seems for everyone who swears by a certain plug, someone swears at it.

My two cents worth... I like Bosch plugs all around. At our altitude, a hotter plug is a good idea, but a cooler plug I believe is advised with a hot coil or MSD system. You have to look at the whole ignition system and where you are driving. Current plug in the hole... W8DC gapped at .040" with MSD-6A, MSD wires, and Bosch Blue coil. (The wires made a big difference, believe it or not). (1.8L with dual Dellortos).