Without sounding like I'm trying to be better than anyone etc, but I'd rather buy a new one, 
I'm obviously not going to do anything drastic, as the warranty and new car stuff etc.... 
  
But the nismo! I love the little attention to detail, like the seats for example.  
  
But if I'm going to go new, and it being a 17 plate, is there anything to worry about or recommendations when it comes to modding something so new?