A high-quality release is essential for this specific film because:
For the file-size conscious collector who refuses to sacrifice quality, the 1080p Bluray x264 AAC release is the perfect sweet spot. It captures the terrifying claustrophobia of the film exactly as the cinematographer intended.
The blurayh264 rip is a 1:1 master copy encoded efficiently. It is permanent . The studio cannot edit it later, and your internet dropping out won't reduce the resolution to 360p.