another colder plug question

Cyclone390GT

Registered
I need some advise on if I should go one step colder or two steps colder. I would like the pros and cons of both. I dont know if it matters much but my mods include K&N conical filter, 2.25 Xpipe with flows, 3.73s, NX fogger system, and hopefully in the next week or so, an LMS chip and UD pullies. Any advice or past experiances are greatly appreciated. Thanks guys!!
 
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