As preparation for when i destroy my muffler on a rock.... has anyone swapped out the muffler on their Hemi?

2 things I'm worried about

1) I dont want it too loud and I don't want drone on the highway.... listening to my kids whine on long trips is bad enough!

2) I don't want it to sound like crap with MDS (no, im not turning MDS off... lol i need all the mpg help i can get!)

To save cost, I'm pretty sure I'll just pick out a muffler and have it welded in when the time comes.