On my Gen 1 Rebel I had a Borla XR1 muffler, the rest of the exhaust system was stock (resonators and all).
I
LOVED that sound, the borla sound profile is beautiful - and I felt bad on frozen nights with cold starts.

I actually started parking further away and walking to avoid waking the dead. Sounded awesome! Loud.
Coming from that the stock exhaust on the Gen 2 rebel was unlivably quiet. Couldn't do it.
The sound of the Hemi is one of my life's enjoyments, it really is. Borla hadn't come out with their unit yet, but magnaflow did.
I went with the magnaflow, and part of me felt it was too quiet, on some days I miss the XR1 - but the cold starts were ferocious.
Now that it's cold out, when I have to run out at night I think I made the right choice!
I did some measuring and found out why. The Magnaflow system uses their 22in muffler. IIRC their main mufflers are a 14in, 18in, and 22in.
The magnaflow is "Big mellow", it's a distant thundercloud.
You still know you're driving a hemi, if you get on it you'll hear it better on the highway - but it hits a volume ceiling and stops. The cold starts are not "Michael Bay" territory
I really do believe this is the exhaust system to get if you want to enjoy the truck, let the hemi breathe better, BUT you like your neighbors, and/or the wife won't like loud either, etc.
I would love to hear a borla touring (with resonator) side by side with a magnaflow.
I believe we had a guy on this board who had the borla Touring and the Borla S-type say that the S-type is louder,
but the cold starts are comparable.