Motor mounts...eh. To each their own, and I will not begin to debate this.
HV3: If you're looking to stay N/A, definitely. You WILL set a lean code with your CAI AND HV3. You WILL need to tune for it. Even more so if you decide to do the d/p and h/f cat. A tune is REQUIRED for a new cam and valvetrain.
How you tune or get a tuned PCM is on you, but I'd rather know that the tune is for MY car and will work..FOR MY CAR. Yeah, it's a pain the ass, yeah it's been expensive, but yeah I've REALLY enjoyed the other side of wrenching on my car.