I discovered Vinegar Syndrome about a year ago and it has been bad for my wallet but worth it I'd say as a big horror movie fan. Their transfers are sublime. There's definitely something special about seeing a movie nearly 50 years old in 4K HD. Even with the 50% off Black Friday sale the movies are still expensive but may as well take advantage of it while I can. I also bought a shit ton of vinyl because there’s been a sale where I live since the pandemic started. Also, fuck Netflix and streaming movies in general.
This is less boutique but Shout! Factory puts out excellent horror blu rays, especially if you're a Carpenter fan. Also check out Vinegar Syndrome's release of Possession (1981). It's a bit pricey but it's absolutely worth it, one of my favorite movies of all time.