I have the SRI by HPS. That seems to be a favorite here in the forum. It's a short ram with a K&N cone filter. Does great for sound and mid range power. And it's inexpensive and easy to clean.
The next favorite is the injen CAI. Since my warranty is about to end, I'll be getting one of these! Puts the power in the beginning (sorry forgot term).
Our cars already use a cold air induction of sorts.
I went with SRI in case I needed any warranty work, I can quickly swap out intakes and the dealer is none the wiser. (after battery reset)
Both will make the car louder if you have aftermarket exhaust. Not sure what they sound like with stock exhaust.
Once you decide, get a MAFS from Jetchip. You can find these cheaper on Amazon, Jegs, Summit, etc.
This will also help with acceleration by correctly reporting your aftermarket intake airflow.
If you get both the MAFS and whichever intake you decide on, and install them at the same time, you'll definitely notice a difference!
Keep searching through the forum, lots of threads and tons of pictures on this subject!!
Also recommendations on where to save money on your purchases.