I'm looking at changing my exhaust these are options I've found thinking maybe Remus but not sure

Factory JCW - http://www.youtube.com/watch?v=v96wWuWLDXg

Milltek - http://www.youtube.com/watch?v=yJBSopPD65A

Remus - http://www.youtube.com/watch?v=QGY3NZ7CqCA

I also like the look of the HKS one but can't find any video's of it or the other option is to go for a custom made one by a local specialist who make systems for Porsche's what does everyone think??