Thank you fellas. Will go with NGK. Which is more beneficial though... Copper NGK and replace every year? Which I dont mind, it'll take 10 mins. Or iridium plugs? Do they simply offer longer interval? I want to get the best performance, do not care for the interval. Best performace in terms of fuel economy and power. So which type of NGK?
Wire diameter choice impacts performance vs longevity. Thinner means better performance but reduced longevity
Also ground electrode impacts performance vs longevity. Tapered electrode is better performance but reduced longevity. The rectangular with platinum disc is less performance but better longevity.
I have a set of NGK BR7REIX (0.6mm wire diameter with tapered ground electrode) coming via Amazon to replace the stock plugs on mine, which are equivalent to NGK PFR7S8EG (which is an expensive plug), which is a double platinum plug.
Denso also has "Twin tips" (suffix of TT), which has a cylinder (I think platinum alloy) welded to the ground electrode to give it a balance of performance (reduced quenching of the flame kernel) and longevity (platinum alloy wear resistance). IK-TT's have 0.4mm wire diameter.
If you went Denso, it would be the IK16, IK16-TT, or SK16R11 (0.7mm wire with standard electrode with platinum disc)