Choosing Lexus and Toyota is a bit redundant imo. Toyota and luxury branded Toyota.
I Yeah, Audi deserves to have its hat in the ring (even though I own one). I've done everything I can to "bulletproof" my A6 and its been awesome for years, but you definitely shouldn't have to go out of the way to "bulletproof" a sedan in the first place. I've put over 60k miles on my A6 and have not had to do a single serious repair so far, but again I have gone out of my way with preventative maintenance and fixing common failure points ahead of time. Having Chevrolet as unreliable is a real head scratcher though, by no measure can I see Chevy being categorized as unreliable.