Changing spark plugs in a small block 360 Any recommendations on which brands are the best to use?

I have run Champions for half a decade without any issued. NGK and Nippon Denso are supposed to be top notch but i don't know how close their applications are heat range wise. Anyone run Platinum's or double Platinum's? Heck, we don't put enough miles on our cars to need a plug that lasts 50,000+ miles.