This is a VERY subjective way of asking this. Your best bet is to meet other Z drivers that have different setups and listen to them and decide which is the best to YOU. Each owner is going to say their setup is the best cause that's what they wanted. They may have different interests than you.
A better way of asking would be to figure out a few things:
1. How much are you looking/willing to spend?
2. How important to you is Sound?
3. How important to you are Looks?
4. How important to you are Performance?
Once you've answered those, people can give you a more realistic perspective on what might be the best setup for you. Also, what are your states emission laws as that will have some impact on your setup options as well.