I'm in the UK where dashcams are not common, but after some research I ended up going for a Taiwanese built VicoVation-TF2+ which got good reviews and seems to be reliable (they claim a lot of taxi and truck drivers use it). I've had no problems with mine and the image quality is very good. Check out youtube for reviews....some from the US.
Its a weird market where most dashcams are sold in Asia, especially China, and Russia. The model I went for doesn't have GPS so doesn't record your speed
...and its got a simple intuitive menu system and a good quality wide angle lens.