[Porsche9]

I read from many of you about the droning issue related to many after market exhaust systems and a few that have indicated that they have setup that is not too loud at full song and quite when cruising with no dreaded drone between 2k and 3k rpms. I am looking to swap out the stock set up (too quite compared to my old 964 with cat deletes and dual outlets) for something a little more visceral but no drone. I'd also like to delete the second cats and hopefully get a few more horses and better throttle response out of the deal. I've read that the top speed cat delete and muffler set up gets the job done. True? What about other setups that you can vouch for?