Hi all, I have a 2005 987 Boxster S so hope ok to post here? my son in law has a Cayman S does that count

The question I have is on exhausts and which ones are best. I have seen the youtube clips for Caymans with
Capristo exhausts with headers and wireless remotes to operate valves to make quieter for the locals! the other option is a Tubi system. Also full system with headers or cat back system. Implications for emissions testing is a concern also.
What are your thoughts?
Thanks.