the R2C i had before did pretty damn well for me. the responsiveness was much better than stock setup and the IAT's were pretty much stock. the heatsheilds they use is far cleaner than the JWT and fits better too.
i originally had the JWT and it sounded good. fitment wasn't perfect and IAT's were higher. i like the fact that the venturies have inlets in the front and conal sides.
im using HPS tubes and KN drop-ins (i already had these from the past) more for noise control. responsiveness is about as good as the R2C.
imho if you're going CAI go R2C.
