I have the NGK Iridiums in my car. I got them off ebay for $25/set. I only run them because they came one heat range colder, they were cheap, and I am running forced induction. If you aren't boosted or spraying, there is no need to deviate from the Honda recommended stock NGKs. And plus, there was no performance increase, just a smoother idle from the crappy Denso platinums.