Spark Plug recommendations?

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I looked through the site and, except for one reference to Bosch Platinum 4 plugs, I do not see any information about spark plugs. Does anyone have any recommendations as to the optimal plugs for our cars and any expected advantages over OEM?

(Bosch has a new plug: http://www.boschautoparts.com/Products/SparkPlugs/IrFusion)

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Found these posts:

http://www.m5board.com/vbulletin/showthread.php?t=74849&highlight=spark+plugs

http://www.m5board.com/vbulletin/showthread.php?t=78679&highlight=spark+plugs

Welcome any other thoughts.