I really like the Viofo A119v2 (not had a v3 yet) and A129 kits, for the money it’s frankly amazing spec wise and Viofo keep the updates/support coming. I would personally opt for the floor route, it’s the side the fuse box is on and in my case (4.2), it’s the side that the cable conduit goes to the rear door. Either way it shouldn’t cause issues with DAB. Also make sure you get the ACC hard wire kit so it drops the camera into park mode.