What are your intentions?
An induction kit will give you a nice air/turbo/whistle sound if done correctly. I've heard some dump quite nicely on diesels as well. You will need a heat-shield to get this to work correctly. I think the KNN 57i is the correct variant for your car.
You're better off starting with a tune and downpipe. If you are seeking more power, after that, then, consider the intercooler upgrade. You don't need it just yet from what I've gauged.