Cain - don't know about the 1/5 size yet, guess we have to see where the market goes on that type of thing (worth the cost development vs. sales). Also we are waiting to see how sales go with VF8 motors we chose first before we do others. We have run both the 1900 and 2100 in truggy with success, motors have worked great.
Graham - the manual in the box will go through each of the settings in some detail. What's the best set up? The one that fits your driving style and track. There is no one magic set up that will make you .3 faster. Its a combination you find during testing and driving. I would start on profile 1 and start working with gearing first. That is most important, esc settings will help you find tune.