My newly acquired NA has an exhaust rattle which is slowly driving me insane. Every time I decelerate it sounds like I have an orchestra of canasta's playing in my rear pipes

To regain my sanity (and give me a reason to add bling) I have decided enough is enough and sentenced my original exhaust to a life far away from my undercarriage. However, this has now opened up the can of worms as to which new shiny stainless steel system I should choose to grace my undercarriage and give me aural pleasure.
The choices I am contemplating are:
Cobalt
Racing Beat
RoadsterSport 3
N Power
I'm not after a raspy sound that will provide a sonic boom anything over 4000rpm.
It mustn't drone and cause nausea whilst travelling at highway speeds.
The mid pipe shall include a resonator.
Something that sounds a little deeper and sportier than original would be perfect.
All the above are available from gomiata except n power. Are there any other recommended resellers that don't want your first born and the rights to your soul?