Hi Fee!
I have just bought my 350Z (GT, blue, no mods - yet!) and absolutely love it.
Had thought about it for about a year and had also had similar thoughts re: TT, Z4 etc, but thought the Z was so much nicer, fun, and of course you don't see to many, especially driven by girls.
Went for a test drive and bought one same day! Picked it up last week and laughed for about the first 3 miles home, I loved it that much.
Insurance wasn't too astronomical, try running a comparison search then ring round some specialist companies, Adrian Flux sorted me a fab deal.
If you have any questions please ask, but the Z comes highly recommended from me!
Do the right thing and BUY ONE NOW
Tori