Rich,
At that price, get all three CD box sets. They're beautiful to look at and display (compact design, mini LP repro sleeves, vintage labels). For the first two sets, I would say that you'll be able to safely get rid of your individual CD pressings. The third, you might want to keep your prior pressings. But the three boxes look great on the shelf together, and at the kind of discount you'd be getting, yes, buy all three.
I don't do vinyl so I can't give you a personal opinion, but the reviews at Amazon for the vinyl version of the third box are about as negative as they are for the CD version:
https://www.amazon.com/dp/B073NXD2MD/?tag=imwan-20Doesn't seem like a good option.