Welcome ig2205, I'm pretty new here myself but the people are great here.
I too have a Viofo A119 v2 and have been waiting to see more info come out on the new A119 Pro. Viofo has said they are working on a two channel system coming out this year, so if you were maybe considering upgrading the front as well wait and see what Viofo will be offering soon in their new 2 channel setup.
Most models smaller than the A119 will come without a screen. If that's fine, you could check out the Mobius or the B1W. How obtrusive or unobtrusive the install looks totally depends on the type of car and how you mount the camera.
This is how the A119S looks mounted in the rear of a hatchback. The Mobius looks a lot more discrete.