well ive just spent £836 inc delivery for an Omex 600 ECU and fully terminated loom made by Omex themselves. This ECU includes all the functions as standard such as closed loop, wasted spark, anti-lag, launch control, etc
So if you were in my position where you had to buy everything, such as L8 ECU, loom, wasted spark board, closed loop and anti-lag - this would have worked out more than what i paid and you would still be using an old loom.
With this everything is new and you also have the added benefit that if something goes wrong its only one sensor that needs looking at