depends if you want to drive a very fast F1 . . .. typical in F1 races at TC there are two types
a) fast car: 540 stock motor, using brushed ESC (such as QC3, 850c)
b) very very fast car: 17.5 turbo, use any brushless ESC has turbo function
Wide Frame 200mm faster than 185mm overall.
200mm Frame (=104W, 103 etc), uses older style F1 bodies
185mm Frame (104Pro) uses newer style F1 bodies (late 80s onwards)
for 200mm Frame, better Scale like body and good performance be something like MP4/5 or 6. The best one, not real scale, most peoplie like is Tamiya Type C (currently not in production), TRG has equivalent (Penny 13/F had stock).
