I always thought that one long magnaflow, roughly the length of the oem muffler would be best to keep away the drone. I would like to know what the part number of SDHarleydad's muffler is. I would rock one of those, not polished and with my custom Ypipe. At the time of my exhaust mod there wasnt much available so I put two together. It works great and should last a long time so I wont be changing it.
