you wont need any sort of tune to just put on a CAI. Just bolt it on and go. They help but are not needed for slight mods like this.
If you want some flash then get a CAI in chrome (from MAC) else K&N will work but some have had issues with the K&N (not sure why though) and dont worry about metal heating up and all that crap... it doesnt make any difference really.
You can get a CAI that leaves the air filter where it is now or you can get one that moves it inside the inner fender. My old mac cai moved it right inside the fender. Here is a pic of what it looked like:
I couldnt tell any difference other than the exhaust tone changed so dont expect any real power gains, maybe 5rwhp/3rwtq from it~