There are far more large scale manufacturers than you think.......
Contrast, H.A.R.M, Bergenzoni, RS5, BIG 5, Mecatech - are just some of them but these never get mentioned on forums like this because they make thoroughbred race cars.
There are choices out there but I think that there is still a devide between blasting across a football field and racing around a track. Companies see this and while there is a big market for people who want to blast arcoss a field, they see that people prefer to buy the cheaper end of the cars available and rather than flood the market, they stick to top of the line cars.