for the cost of a ae car you should just go with the tc5...i dont like ae cars but my friend has a tc5 and i drove it....way better than his ft tc4 that he had.
as for radios and speedo goes..you can score really good deals on here in the for sale forum...
alot of people are going brushless...i was thinking of going to it myself.
a bit much money to spend though...
as for motors.........any based co27 stock motor.
need any other info pm me i can hook you up with a good deal..
matt