Ok since I just got done doing this here goes.
You need to decide what your plans for the car are before you rush out and buy anything.
Do not under any circumstances buy a cam solely because its labeled by a "stage"
Do some research on how cams work. Specifically the definitions of these terms....
Lobe seperation angle
Duration
Lift
Intake centerline
The difference between advertised duration and duration at .050 lift
Once you are familiar with that then call and talk to some shops and just ask what they think would be the best for your application.
Once you get the ones you need the process is fairly straight forward and not cheap.
Once you start getting above .550 lift and 211-220 degrees of duration you will need valve springs. Other than that the stock rockers, chains and gears are fine providing they are in good shape.
One last thing you absolutely have to put a degree wheel on the engine and verify the valve timing. If you do not and somewhere along the line you let a chain slip you WILL be replacing your engine. The process is simple and straight forward and takes about an hour. The tools for the job are 86 bucks from summit.
Here are a couple links.
http://www.modulardepot.com/?show=articlesdet&aid=39 http://www.modulardepot.com/?show=articlesdet&aid=32
All in all swapping the cams out in the car really itsnt much harder than if the engine is on a stand.