Best downpipes for a mk7.5?

I recently bought an awesome track exhaust and a cold air intake and love how they sound, however I feel that it’s still too quiet for my taste. Everyone keeps telling me to get a downpipe. Just curious what brand everybody has and which one is the best. I also would like to know if it will throw a CEL. Lastly if I do get one will I need to get it tuned? Thanks!