I had a Magnaflow put on. Very low grumble when Idle, overall just sounds great. Don't compromise with the tips either. I got black chrome put on mine it sets the exhaust off and lasts forever, no rusting. Pay a little more money for better tips you'll thank yourself later

 

I just put a cherry bomb extreme on my 05 4.7 with all the resonators removed and am very pleased with how it sounds. Not too loud I wake the neighbors when I roll in during the wee hours of the morning.