I'm waiting for delivery of my 348 Serie Speciale...(ultra jazzed about that)...and looking through various website to find info regarding this beauty. At the348.com site they recommend changing plugs to a platnum split fire style. The Ferrari dealer said they are not good and has submitted a estimate for a Minor 15k service where he will charge $244 parts plus $80 labor to replace plugs with factory. I know I need to be prepared for outragous fee's but... Anyone got experience with other plugs? Are they a problem?