I need help on deciding which muffler for my hd

[02crewhd]

Yeah seems like I keep getting more and more recommendations to get the big magnaflow Even the local exhaust said to run one but in the same breath said he didn't do a lot of 6.0 trucks. Prob going to do the big di/do series and let her talk to me like I said before I don't mind the tailpipe sound just hate the drone in the cab thanks all for the help