Well, consider that "What exhaust will make my car sound better?" is probably the male equivalent of "Does this make my bum look big?"
You're likely to get a biased, subjective or otherwise evasive answer. Not often does someone stand up and say "I spent $2K building a custom cat-back system and it sounds rubbish". Also, if you're standing behind your car listening to the exhaust, you're not driving it - which kind of defeats the purpose.
My standard suggestion is to buy a cat-back factory exhaust off a matching wreck, and use it to experiment with muffler deletes or swaps. This is not the fastest or cheapest route, but the easiest to reverse if it's terrible.
