I’ve got just about all of them on CD or vinyl, Agharta ands Pangaea are great, all the 70’s ones are worth a listen , some sound a lot better than others. Plugged Nickel is essential, I’ve got the box set, earlier , Four and More and My Funny Valentine are superb, second Quintet with George Coleman instead of Shorter. Also We Want Miles isn’t bad for 80’s Miles. And the bootleg series are all great, cd’s are fine for them, a couple come with DVD’s that the Vinyl doesn’t have and the sound quality isn’t really much of an improvement, that Europe 69 set is great, but it’s full on so maybe have a listen online to see if it’s your thing, If you like Agharta you should be OK with it but it’s even more full on than that and Jack plays a lot busier than Al, who basically just plays a backbeat the whole record.Lots to explore though and so much variety , you’ll never be bored!