Which Le nozze di Figaro on Blu-ray is better?

[Yeha-Noha]

It's nearly a tossup for me, but I wish to add this great opera buffa to my collection of opera on blu-ray. Rather, than flip a coin, please help me decide. No matter how I slice it, it's going to end up being a blind buy though.

The critical elements for me are the performances of the singers and especially their arias, the staging, the balance between the orchestra and singers, the acting (can the singers act as well as sing?), the orchestra, its direction and sound, and of course the BD sound quality including good audio mix in the surrounds and good bass.