It's hard to get better than the original-equipment plug the engine was designed to run. I spent a lot of years in the service trade, using OEM plugs unless the customer insisted on using something else. AC for GM vehicles, Motorcraft for Ford, and Autolite for MOPAR vehicles. The only really bummer plugs I've encountered were the NipponDenso plugs that Auto Zone used to push as their bargain-priced offering. The Prestolite plugs the military BX system used to sell were a pretty close second on the "piece of crap" list back when I was patronizing Air Force auto hobby shops, but that was 30 years ago.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!