It is subjective. I like x pipe + mac and x pipe + magnapacks. I've heard plenty of other setups I like too. It's best to just browse videos and figure out what you like.
[ame=http://www.youtube.com/watch?v=226FujL3Pnw&fmt=22]YouTube - 2003 Mustang Mach 1 in HD[/ame]
[ame=http://www.youtube.com/watch?v=226FujL3Pnw&fmt=22]YouTube - 2003 Mustang Mach 1 in HD[/ame]