Flowmaster is what most Dodge drivers end up going with; most of the time being the 40 series muffler (runs about $350). However, I personally love the 50 Series (runs about $400-450) for a few reasons.
1. its made from stainless steel instead of aluminum
2. provides a quieter interior noise without dampening exterior noise
3. provides slightly better air flow or better gas mileage than the 40.
If you really want to drop some money, look at Borla