Two things to consider. First, if you upgrade the turbo you need bigger injectors as well. These two items, along with a new chip, would run over a grand. Second, the highest priced alky kit only runs half that. I also think your best power increase would be the alky kit. The turbo would have more power by being more efficient but you'd still only be able to run 17 or so psi. If it were my choice I'd go the alky route.