exhaust upgrade question

i was just wondering what i would have to do to get my exhaust to sound like a 350Z or G35 with the nismo exhaust system on it. what mufflers, or headers or what. i like the way it sounds because it dosent sound to ricey but it dont sound like a V8 either. the problem with the exhuast with the GTp is that the tones change like it sounds beefy through 3300PMS or so then it sounds really ricey i dont want the tone to change like that