Invidia looks really nice and when your not at cruising speed and listening to it drone badly it sounds nice too. I had one on my 350Z, it was really loud in the cabin and that wasn't a convertable.

 

After I installed my test pipe the drone all but went away... but it's louder outside... Actually now I'm starting to consider a single exhaust... figure i'm used to loud.. might as well go really loud... mmmm

but I DO love tunnels...