It all depends IMO. I have reps and ended up with a great company. I've hit some good sized potholes and drove on crappy roads and have had no problems (knock on wood).
Just remember, every rim can bend/crack. I've seen OEM rims bend. Don't get me wrong though, there's a lot of garbage out there and just be careful with what company you go with.
I've heard a lot of good things about rep companies like VMR and Miro.