I might have the opportunity to purchase the BNVD sentinal ANVIS-9. I can't decide if I want to buy them or the PVS-7. I know I'll get better depth perception with the ANVIS-9. Is that all I'd be getting? I'm not a millionare so if I can get roughly the same quality with the PVS-7 and save a little money Ill do that. But if I can't get the roughly the same ill go with the ANVIS 9!