I smacked my car into a snowbank-covered rock (understeered on ice) pretty hard, I thought the whole side of the car was toast. Turns out my left front Rota Tarmac 3 took the hit -- thank God. Both driver-side control arms bent very badly, tiny scratch and crack on the bumper cover -- that was it. The wheel got scratched but that was it also -- it didn't crack and stayed true. I drove the car on those wheels for a while before selling them, and even did a track day.
You should be fine, Rotas are a strong wheel.
Another very strong cast wheel is the Prodrive P7, it was designed for rallying and will withstand an explosion. They are 17x7 and are cheap, I sold my very clean set with worn tires for like $400 locally.
Stan