Magnaflow, or other "straight thru" type muffler is best for little to no drone. Depending on the muffler it will have a slight "tune" to it. I like how mine sounds with the Maggy 14" 4x9oval and turn down.
If you want quieter, I would go with the 16 or 18. I picked my muffler up on amazon for around 50$. For "stock replacement" you will want center in, offset out.
A good local exhaust shop, with mandrel bender should be able to do something for you for a good price.