nice idea addressing flow at both ends :P
wrt to the wheels - my 2p drifters etc are giving it stacks in a controlled environment where things are de risked to a certain degree, individuals behind barriers and themselves inside strengthened cars if they have a failure it can be contained if you are doing 70 on a dual track or motorway and you get a stress fracture it is harder to contain and the ramifications can be greater due to the surrounding environment.
Also if they dont fit spot on with the car you have, there could be undue stressed on your bearings and hubs - you have spent a lot of money on a great car, I dont think it is worth it.