Good to see you here asking questions about the 350z!
There are a bunch of ways to go when getting a 350z.Check out the Nissan site to find out which options that you must have.
http://www.nissanusa.com/vehic....html
I got my 350z New just over a year ago. I wanted a new one for the same reason that you are thinking about it, I wanted to break it in myself. I also only drive mine when the weather is good or if there is a Nico meet that I must go to.
IMO the Enthusiast 6-spped is the way to go. I like the HID's and LSD.
The Track is good to get because of the Brembo's. I would like to upgrade my brakes one day and break upgrades cost out the butt. The only problem is getting a Track at a good price.
The Touring gets you leather and the Bose.
The 05 350z Track and Anniversary is getting more HP but less TQ so thats kinda a wash.
Ask lots of questions and find out what you want.
Good Luck and check out the Z car picture thread...
http://www.nicoclub.com/zerothread?id=83061