I am looking into a greddy turbo kit as well for next yr. From the research I have done. They work great with the intercooler and blue box. They put down 230-250WHP with some minor bolt on mods. Its also best to run an ignition unit to retard the timing a little.
The people who own the kit all say its great if your prelude is a second car.....but its not as great if its your DD....some minor problems usually happen about once a month.