Silverstone Spark Plugs in SR

[sr20det]

I have a question to some of your technical guys out there or anyone that can answer my question. Ok, i did alot of research on splug plugs and i dont understand why do most of SR guys out there goes with Irridium plugs instead of Silverstone plugs? they said that silverstone plugs have 130% more spark than stock and also i know that with irridium the heat range is different but doing 14 - 18 psi on an sr motor which plug is recommanded and why? Also, since silverstone give me more spark should i go with that or should i get an irridium ? Which spark plugs is the best for SR and WHY ??????

:help :ylsuper

Heres a site to the spark plugshttp://www.bbperformance.com/BB/ImportZ.htm