Welcome, a 370z roadster, good choice you have taste, not that I am biased of course.
First thing you will need to do is change the stock exhaust and make it sound like a proper car.
370z normally come in gt and non gt specs. Gt has leather / heated seats and the sat nav. If I were you go for the gt.
If buying a second hand 370 roadster please please check that the windows don't catch the roof material and that there is no wear on the roof over the windows. A couple of owners on the forum have had problems and it's very tricky to fix. One chap is on his. 3rd roof now. On most cars it's fine (like mine) but if you see anything dodgy walk away, don't even try to bargain the price down.