Looking for some help!

I've been a fan of Saw for many many years and have been super fixated on it since lockdown, but I'm currently only able to watch them scattered across streaming services. I'm currently trying to watch my favourite (Saw VI) while I can't sleep but the endless buffering is finally pushing me to my breaking point.

I'd love to have a way to own the films offline. Ideally not DVDs because I'd have to buy a attachable DVD player for my laptop, but I'm assuming buying a DVD boxset would be more feasible? I'm such a gen Z streamer I really don't know!

I've only so far watched whatever versions are on streaming but my ideal situation would be to have the unrated/ director cuts all on my laptop. Even better actually would be a way to have director commentary's and any good DVD extras.

I tried to look on amazon and google but it's not clear what's the cinematic release and what's the uncut versions, and also they're all DVDs options. If anyone in the UK could suggest a good way to get the full set of unrated versions on my laptop I'd be super greatful!