Screen Damaged - Need advice on what would parts to buy to fix it?

Looks like the screen back case is fine if you only want to buy the display itself, but that is going to make it more difficult to change cause you'll have to get the old one all the way out of that back case. If you buy one with the back case it'll be more expensive, but easier to swap, since you'll really only have to take off the entire screen and back case, unplug it from the board, and plug the new one in and attach it to the bottom case(bearing in mind there are other components you'll have to remove and reinstall regardless of which one you buy. Which one you buy will all depends on your level of expertise and confidence.