For real... get
http://www.invisalign.com/ if you can..
I had braces when i was a kid, my teeth were real screwed up.
After they were all fixed my wisdom teeth came in and pushed my teeth around a bit. It wasnt too bad, but it was enough to make me want to do something about it. I got invisalign the next time...
I think for extreme cases you still may need braces, but if your teeth arent too jacked up they can do invisalign. I've been through both.. Invisalign is definately the way to go if you can do it. Braces are pure hell.
With invisalign they will give you usually like 3 months worth of retainers, and you dont have to go back till you need the next set. With braces your in the orthodontists office every month getting your wires changed. Its a hassle. Plus you can take off invisalign off when you eat. Nothing worse than having food stuck in your braces all day. Braces also tend to really chew up the inside of your mouth.