go w/ the treadstone kit, 550cc, ecu and tuning. you'll spend more in the long run w/ the greddy kit and be less happy with it.

310cc inj are good for about 200-220whp if you bump up your fuel pressure and running high duty cycles. always get an injector larger than what you need so they can run at a lower duty. risk of failure is much lower and your fuel doesn't heat up as much running through a maxed out injector. plus you always have room to grow.