well, actually, you'd benefit from both.
I have a simota aeroform and just recently had the ktec cat-back recessed fitted to my 172.
did not go for super sport in the end, I did want to, but after fitting, glad I didn't. this one is subtle but still very much noticeable and compliments the simotas sound very well.
I prefer more growl than just a load of boom.. but each to their own.
decat will obviously give you alot more sound too and it'll be raspy. perhaps the next step for me after MOT/when I can meet someone with a similar setup with decat to ensure it isn't going to make my ears bleed.
