So I have been wanting to get the various Marvel Universe movies (or at least most of them) on Blu-Ray. I done a bunch of browsing on Amazon. I see various options. There are the individual movies. There are a few collections out there: https://smile.amazon.com/Avengers-Collection-Box-set-Blu-ray-Region/dp/B07J2YTBGM/ref=sr_1_9?keywords=blue+ray+4K+marvel&qid=1558354658&s=gateway&sr=8-9 There is also an Iron Man Steelbook 4K collection, but it looks pricey, or out of print at $99 https://smile.amazon.com/Trilogy-Limited-Steelbook-Ultra-Blu-ray/dp/B06Y2LM2T1/ref=sr_1_1?keywords=iron+man+steelbook&qid=1558354936&s=movies-tv&sr=1-1 Other collections appear to be just Blue Ray. The same with the Marvel Studios Collection Phase 1/2/3 box sets. So with very few exceptions, its going to be pick up the individual titles? Is Atmos on 4K/HDR discs by default, or do I have to fish through the releases? Any opinions on the value of the pricier Steelbook editions?