After experimenting much with custom exhausts and not getting what I wanted I settled with the Tanabe Medalion Touring dual exhaust cat-back system. I really like the quality and sound that it gives. No drone either.
It's coupled with a customized Comptech Icebox cold air intake and Comptech headers so the overall sound is not obnoxiously loud but yet throaty and smooth. There are videos of this system on the web but they don't appear to have the same setup that I have so the sound will vary. They are not as throaty as mine nor do they have the same low growl that I like. It gives a more subdued level of sound compared to other cat-backs. Hope this helps.