Well no, I'd say, not until you've ridden the Jackson as is. It is so nice already. The Campy gear may be better, but my guess is it isn't. Anyway, the Jackson was a gift, given to you because you appreciated it. I would leave it as is --overhauled and maintained as necessary, of course-- and get to know it. Once i'd ridden it a good bit, I'd feel free to make any changes necessary.