V6 Mustang Exhaust

I have a 2000 Ford Mustang V6. I am looking into adding some exhaust to my car. I have different opinions on the types of exhaust to add to it. I am trying to avoid such a loud rumble inside the car while having a good rumble outside the car. All opinions are welcome. Thanks!!!!

I had straight exhaust from the converters back and I thought it sounded great on the outsid and decently quiet on the inside it was a 3.8 ford thunderbird.

Wish I could let you hear it so you would know what to think, but I don't have it anymore.