Most glasspacks (called cherry bombs around here, no matter what the brand as long as they are red) are all about the same as far as durability and sound. Even the $10 ones they used to sell at Quality Farm & Fleet. I've never had a single one rust out. The welded type mufflers do rust out, even the Flowmaster brand. Except my Hooker Aerochambers, they seem to be holding up as well as any glasspack.
Some will refer to Glasspacks as "Cherry Bombs", Just like they call all Arc Joint Pliers - "Channelocks", and all String Trimmers - "Weed Eaters", But doesn't mean it's right.
Just Sayin...
I never have liked glasspacks. Quiet or Loud. They're a great way to "Cheap Out" and get something legal so you can drive it, but past that, I'd go with a muffler. Take your pick, Thrush, Dynaflow, Magnaflow, Flowmaster, whatever you like.
In the race days, a couple guys did have the glasspacks with the Header collector flange on it, just to bolt to the header and be street legal. But 6 bolts later, it was uncorked and racing w open headers. Didn't even need to use hangers for them.