Best aftermarket exhaust system for 2011 F-150 5.0L V8

[640 CI Aluminum FORD]

Hey everyone. I've had my 2011 F-150 FX4 supercab for a few months now, and I'm starting to consider putting an aftermarket exhaust system on it. I use to have an old 1990 F-150 back in highschool that I put Flowmaster 40 series on and it sounded great and the mufflers never had any rust issues. For the record I owned the truck for 4-1/2 years. But I have heard some people complain that Flowmasters are low quality compared to other mufflers. I plan on owning my new F-150 for many many years to come. I really do like the Flowmaster sound and the new 10 series are suppose to really make some noise. But I don't want to be having any rust issues...At least not for the first several years. I've looked up some online clips of the new 5.0L F-150's which have had exhaust work done and honestly they all sound great. One in particular that stood out to me was Dynomax bullets...They had a very good performance sound to them, but I know next to nothing about Dynomax. Another one I beleive was called MPBR or something to that extent. I'll post the video clips on here tommorw ''when I get off work'' so you can see which one's I'm talking about. But what are ya'lls thoughts? What do perfer/recommend?