I have the Top Fuel Intake in my VTiR, imo it's a great intake system, looks good, sounds great, did feel a bit more responsive.
Other good intakes to check out are the AEM and Injen CAI's dyno proven gains.
All in all i would recommend it got mine from 999Auto.
Don't no anything about HKS exhaust, but if your in the market for something not too loud but screams when you give it some check out fujitsubo rm01a sounds great.