Now that you mention it, they are indeed very centrally located compared to other vehicles. I guess I just didn't notice it in the past.
I'm not very familiar with aftermarket exhausts, but I've heard Borlas, Magnaflows, and Tubi exhausts and I find those to be the ones that I'm familiar with that sound great.
I really find the exhausts on Aston Martins to be especially appealing. It's a very deep and refined sound. That's my favorite part about Aston Martins.