Mufflers choice ?

Three basic muffler types, straight thru, (can have offset inlets or outlets) turbo style, and chambered (flowmasters, hooker aeros, and copies).
Find the sound you like and go from there.
Generally, straight thru are loudest, turbos quietest, and there is a reason flowmasters are also known as dronemonsters.
My solution for good power and reasonable quiet is: get the proper size through pipe for the application, and then get the biggest, longest muffler that will fit under the car.