I've read through your whole thread, some superb work put in here.
I've recently acquired a Gunmetal 55 plate 350z. 50k miles. I'm getting the standard rays powdercoated shadow chrome next week, other than that it just has a scorpion exhaust and thats it. Such a fun car to drive.
I had an EP3 Type R before this, done a few track days in that and it was great - I bet a 400+ bhp charged 350z would be HILARIOUS on track!
In your opinion, what is the best value modification to do to a 350?