| hey out of Autoart/Ninco/scalextric/SCX which is the most raceable or able to mod the easiest to be competative |
I would forget SCX, they need the most work and generally are very narrow cars; the other brands will all need about the same amount of work. Scaley and Autoart will be sidewinder cars, Ninco will probably be anglewinder; all will need new wheels & gears.
| Also I was noticing alot of BMW M3 models is that covered under the 3 series. It is kinda a gray zone as it is the 3 series entry of the M series |
BMW is one of the model that can be used both on Touring and GT; for touring you need to look at the body, it should look like the street version.
I also have problems identifying differences between touring and GT cars; my best advice is to use google images 
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Clipped from wikipedia:
For the casual observer, there can be a great deal of confusion when it comes to classifying closed-wheel racing cars as ‘touring cars’ or ‘sports cars’ (also known as GT cars).
In general, however, touring cars are based upon family cars (such as hatchbacks, saloons or estates), while GT racing cars are based upon more powerful and expensive sports cars, such as Ferraris or Lamborghinis (and are thus usually coupes). Underneath the bodywork, a touring car is often more closely related to its road-going origins, using many original components and mountings, while some top-flight GT cars are purpose-built tube-frame racing chassis underneath a cosmetic body shell.