CAI or intake manifold

[willyz30]

A lot of the info I've been able to find is dated back a few years. I'm new to the forum and hoping to get some opinions from some owners with experience. I've got an 09 g37xS sedan. I have a stillen aluminum under drive pulley, berks hfc's, and had a local shop fab some 2.75" pipes from the cats to the resonators eliminating the Y pipe and ridding the car of the terrible rasp that comes with hfcs and creating a true dual exhaust. I'd like to do maybe one more mod and then have it uprev tuned. Headers? Intake manifold? If I go intake I'm sort of torn between R2C short ram or stillen gen 3. Which seem tops of each type of intake. The R2C is around 100 dollars cheaper and would be easier to intall, but I've read of better gains with stillen. Any suggestions are greatly appreciated.
Thanks

[arrow23]

Stillen Gen 3