what are you looking for?
I think that it all depends on what you are looking for...
If it's only sound of an intake, then YES, it would be gay to spend all that money on a CAI.
If it's performance, then not, since you would hear it, but you would also feel slightly more power in the top end, as well as better throttle response throughout the rpm range.
Eseentially, it's up to you. Don't think you'll gain BIG HP, specially on an auto. You'll probaly get around 8-10 HP if you're lucky.
Anyhow, I drive an auto as well, and I've got all kinds of things planned out for it, including SRI and full exhaust, so would you consider that gay?