Ghoshy

Hey, so i picked up my first ever Subaru today and I really want to get a nice exhaust system for it but don't want anything that will drone to much when on the motorway as this will be my daily. I have a Impreza 2008 2.0L R single pipe and want to know if you guys can suggest any nice sounding system? Ideally I'd like to keep it under £700 thanks!!!! Ghoshy