see the point khare makes totally, i however had tosell my magnex becasue the bore was not large enough to let my S3 engine breath so i went Jetex and im gonna be honest, its superb. i paid 317 for cat back non res, full stainless.
i then bought a stainless sports cat from usa and also a custom stainless downpipe, i bought this set up because it was needed and not just for looks/sound

obviously my requirements are different to what most will wan from a exhaust