It all depends on what you’re looking for regarding sound because it’s all a matter of taste! One mans noise is another mans symphony
All I can recommend is youtube different setups and brands to get a better idea of what you’re looking for. You will also have to keep in mind the level of interior resonance or “drone” you are willing to tolerate vs exterior volume.
I wanted something to make that hemi under the hood rumble, and by rumble I mean a nice DEEP tone. However I still wanted something nice and mellow while cruising on the highway. Therefore I installed a 5x11x22” PN# 12588 SI/DO Magnaflow muffler and deleted the resonators. It sounds exactly like a Maggy CatBack (because it’s the same one that comes in the kit) just much cheaper. It has a VERY deep tone on a cold start and I can hear it whenever I accelerate and it screams at WOT. Yet while cruising it has the same interior volume as stock... just a different, deeper, more pleasant tone to it.
Hope this helps!