I have just bought a 99 A4 1.8T and have been considering chipping my car, but i'm not sure which company i should getit from. The two companies i have looked at are TAP and APR. I don't know much about either so hopfully someone can tell me either which one is better or of a different company. I'm going to try and keep the chip under $500 but i also want the most Hp gain as possible also.