If really looking to push the boundaries you will need to ditch the dizzy setup ideally, unfortunatly the PFC doesn'rt support 4 ignition driver outputs (not for the starlet AP engineering one anyway) I would be looking at something like Link, Haltech as the kinda mid range ecu's. Unless you really wanna be spending thousands on motec, pectel, syvecs etc but thats your choice. I would keep an eye out on ebay, you can pick up some motec's on there pretty cheap ;)