Quiter/sexier exhaust?

[dogwhistle]

I have a straight 3" pipe from turbo all the way to a exhaust can and a 4" tip. It sounds mellow and great when under load but it is a little weak in the treble and cruising/most any level except WOT is too loud for my (and neighbor's) taste. I was even debating a stock muffler with the same system but don't want to restrict any flow excessively. Any sound clips or recommendations? I'm really open to suggestions and even like the sound of J's racing exhaust on an S2K for reference despite the DB rating though. Also, something more subtle visually will probably keep the boys in blue from perking interest as much as well. Thanks!