I have Bosch Platinum +2s. They have made my idle smoother and my car used to stutter when I would rev it but it doesn't do that any more. They are only $3.99 each and you don't need to gap them. Plus for when you talk to people who don't know too much about cars (like most honda ricers) you can tell them that having two ground electrodes on you spark plugs adds 50hp.

 

i have them too. well technically itll only arc on one electrode, but its nice to have 2 when one fouls up.