snorkus delete is worth 100%...basically youll hear your turbo spool perfectly, you will hear you stock bypass and a deep growl like a intake.
as for an exhaust id say greddy EVO2, not really the power maker but sounds very nice... personally im goign for a TANABE wich is LOUD as hell but thats what i what really...
i encourage you to try 25pounds in you back tires ...youll get MAD oversteer :p almost too much fun but recalibrate later, in cold of course .