Doctor speed Intake, what stage do i need?

I have a '99 grand am gt and have enough money to buy any one of the 4 different intakes that are on doctor speeds web site. What one will add the most performance and sound the best out of the 4? Im thinking either the stage 3 or the cold air box. Any info on these will be helpfull thanks! Will i see a pretty noticable difference with my car once this is installed or is it not worth the money?

the link to their web site is-
http://doctorspeed.com/grand_am/grand-am-intakes.html

Brots, I would deffinately go with the cold air box. The intake debate has been discussed forever, but in this case, in my opinion, it boils down to the cold air box being better / more conveinent / even gain throughout rpm band. It will sound sweet, and the short-ram setup will give you a lot more kick off the line then a CAI. You should see a gain of anywhere from 5 to 8 horses if your car is stock. It's deffinately worth the buy - If I were you, I'd make a custom one, but if you wanna buy one from the doc, Cold air box is the way to go.