fyi fellas, ford falcon o2 sensor fits rb engine, needs ten mins of wire changing, but can be had under 30 bucks from retail stores. i used it and it was fine.
in seriousness tho OP who i dont think has been here since first half of first page.
always hear good things about the tuners mentioned.
what ever you do, google the tuner your going to and heed any warning you shall find!
i went to a top tuner and wasnt happy. experiences may vary.