What would you guys go with for a replacement muffler? I'm considering Flowmaster, Magnaflow, and Borla. I'm leaning more toward the Magnaflow and Borlas however. Borla is on the top of my list mostly because it is totally made up of stainless steal and therefore won't rust, but it costs more. Even more greatly, I want to keep my car quiet, only a LITTLE bit more agressive than stock, but not much more. What would you guys suggest? How would you rate these mufflers from loudest to quietest and best sounding, assuming all were installed on the same vehicle and all other factors were the same.