Depedns what reps you get the Hargus(sp!) ones where spot on, I had them on my car for almost the whole time I owned it and they where perfect.
You can get cheaper coppies, inpro for example, and they are no where near as good. And the only time I compared them to the original s3 ones where when they where 18 months old and they still looked spot on.
Don't forget that price on vag-parts is without the vat...
J.