your best bet is to listen to all the different mufflers on YouTube and pick the one you like best. I had Magnaflow mufflers and a Magnaflow resonator on my last GTP and it sounded good but it was too loud with all the highway driving I had been doing. I changed the Magnaflow res to a ZZP res and it helped, but was still too loud for me. I don't plan on ever changing my exhaust again, unless I install a cutout for a no restriction exhaust.
Everyone has their own preferences so research and pick one that suits you.
You wouldn't happen to have a video with the magnaflow resonator on your car would you? Was it a mellow deep sound that worked well with the magnaflow mufflers? I have a stock res but magnaflow mufflers. I'm just looking for the sound to travel.