Take a look at the HP curves for any of these intakes, assuming you can find them, and ignore the peak HP claims. If you are a daily driver then you need to look at the curve to see if there are any gains in the RPM range that you drive at. From what I've seen, most of the reputable aftermarket, actual, CAIs only add HP after 3500-4000 RPM. If you don't spend a reasonable amount of time above this rpm range, you're benefit is strictly the for the sound of it.
Look at you stock intake, it is a CAI. Now the air path can be improved by straightening it out, but again, those benefits only appear at the higher rpm ranges where those bends start affecting air flow to the TB.
My opinion is that unless you want the sound, or the look, or the few HP that you gain at the high end of the rpm range, that it isn't worth it. I have the same opinion on cat-backs, they have a use, but are they worth it for your use? That's definitely your decision to make.
BTW, in the interest of experimentation on something new, I am going to be attempting to plumb a Volant Air-Ram into the stock air filter
housing to see if there's anything interesting there. Not going to dyno, but I'll be watching mpg's and I have a G-Tech to check for any performance gains. Ram air modifications don't tend to show up well on dynos anyway.