Anyone have any recommendations of spark plugs and why they recommend them?

Platinum
Iridium
2 prong
4 prong
etc

The 4.8I is about to 100K and when it's cold it has a couple hesitations but runs smooth at higher rpm's.

Thanks Kevin

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02 BMW X5 E53 4.4i Sport
07 BMW X5 E70 4.8i