QNAP Model: Which of of the current model is the best option?

Can’t say for sure how the TVS-882 will perform. But maybe this helps: I’ve compared the TVS-471 (with Intel i7 cpu) and TVS-473e (with AMD cpu) here.
Both perform pretty good. One plus point for the TVS-471 (and this also applies for the tvs-882) is a swappable cpu (originally it was equipped with an intel i3 cpu).