My Accord gained a few tenth in the 0-60 thanks to my AEM CAI because my wallet got several hundred dollar lighter...doh!
Best bang for the buck, remove resonator install K&N filter, call it a day. ($30-40 thanks to performance gurus at Napa or Autozone.)
Save $200 toward new sticky z-rated summer tires = best performance bang for the buck. Or a nice set of high performance street rated brakes pads, when properly beeded in are more noticable then HP gains from CAI.
Not to mention your car just got safer and easier to control, which hopefully keeps your @$$ from hitting mine on hiways and biways of America.