If you keep the chip, you'll have to send it back to a tuner for them to reburn it as you add more mods. There is no point for you to keep it and get the Xcal 2 because you can't use both at the sametime.
Just get the Xcal 2 and dump the chip. :)
Don't be a wuss, do it yourself. Besides, you will learn things about the car and become better at working on it yourself(plus you'll be savin money). :nice: