stock motors can see gains from a real tune as well. it's not uncommon for stock motors to see 10whp from a "professional" tune. vafc is worthless IMO. what you could do tho is go to
www.tunewithcrome.com and download the free tuning software. Find someone who knows how to tune hondata (crome can do just about anything hondata s200 can do, and most shops that tune hondata can tune crome) and let him tune your car. You'll spend 175 dollars tops to have a better running car, with more power and better "get up".