Having trouble deciding

Along with the cold air intake im looking for a decent cat back exhaust system. Im looking for a mellow deep quiet tone (not deep enough to give you headaches) since it is a daily driver but I do want a distinctive sound when I open it up on occasion. I would like to gain as much low end hp as possible but I understand exhausts dont give much power anyway. Any tips on what brands to look into as far as decent price and performance is appreciated.