TC
Stay away from the TC5, Associated hasn't had a good car since the TC3. The Tamiya 416 will be a good car, as was the 415. Personally I'm an XRay guy but if I had to choose between the TC5 and 416 I'd go with the 416 regardless of parts availability or how many other drivers are running it. With lots of track time you should be able to land on a good setup yourself, it just takes lots of testing and tuning.