What do you think is the highest quality/ most expensive sunglass brand owned by Luxottica?
If your really looking for prestige you need to look at other brands such as Cartier. Cartier sunglasses can be rather expensive. But to be honest I don't know how much prestige even a pair of Cartier sunglasses will get you, as I haven't found the pair I own to get me anywhere. My Patek hasn't made me a better person either. But I do like the way they look, and how easy they wear.
Prestige, price, and high quality often don't mix. For example, Oakley makes a lot of tactical eyewear for military, law enforcement, and other government personnel. It's some real high-quality stuff, like ballistic goggles and glasses that soldiers in combat zones wear to stop shrapnel. That said, these products don't look prestigious, stylish or attractive in the least, at least by SF iGent standards, but I would certainly consider them some of the highest quality offerings from Luxottica.
Just buy what looks good and suits your tastes.