I currently have a Viofo T130. Under $200 usually (like it is now with the 20% off). Another $20 and you can get the kit to hardwire it in so it'll record 24/7.
Size is very important to me, I didn't want something big and clunky with a screen on it for a dashcam. The 3rd\interior channel can be tilted to be pointed out the drivers window, so it'll record that as well. All in all, does a pretty good job.
Toss in a memory card, it's some of the cheapest insurance you can get for $250. Follows the same logic as condoms. I'd rather have it and never need it, than need it and not have it.