Auto Racing: Spark Plug Wires, cat back exhaust, stock ignition

Question
Hello, I have a 2004 Honda Civic Si that is stock, aside from a K&N intake and DC Sport header and cat back exhaust that was just added. A dyno test showed I gained some hp and torque with this. Now I've been thinking about upgrading the spark plugs and wires to something better than stock, but have only seen info on Nology HotWire Spark Plug Wires. Are they worth (around $200) upgrading to or should I stay stock? I don't plan to race, but would like the extra power they claim to offer. Thanks for the help in advance.

Answer
I have tried Nology wires and found no improvement. Hondas have VERY good stock ignition systems and I don’t think you need to worry about upgrading it until you start running some sort of forced induction. Best bang for the buck would be a grounding kit, SCC did a review on a WRX they installed a grounding kit on and if I remember it yielded 8HP or something.