Spark plugs, best "stock" for SC'd boxster

[pk2]

Hello,

I’m looking for the longest lasting spark plugs that could be considered “stock”. I’m going to be supercharging my 99 2.5. The SC people in the know warned against platinum plugs and advised stick with “stock” plugs.

But, once the SC is installed it’s impossible to access the plugs without yanking the blower out. So before it (the SC) goes in, I want to put in the most durable plugs I can (that still falls under the “stock” category).

Thanks, PK