Personally, if I would have tried to build a kit for my first car...I would have messed it up somehow. It helped me a lot having a RTR first and learning to tear it apart and rebuild it little by little. Now I only build kits and will never get another RTR just because I want to build it and I know I'll build it right.
Just a thought but maybe go with a RTR first unless you have already owned RTRs and I misread your post in which case you could just ignore my comments altogher and go with the NTC3. I would recommend the LD3 Pro but the instructions have to be the worst I've ever seen (great sedan though) and if you've never built a kit before it would be quite troublesome.