My favorite thing I've seen for how people deal with boxed stuff like this in these kind of amounts for boxed figures, is to make their display look like store shelving, where it's got the bottom and top shelves and then the middle is all hangers, so it's like you are walking into a Toys R Us or something. It doesn't really make it easier to see stuff, but it's such a good look if you can get like legit store shelves from like a closing business for it.
Cool collection though, there's a part of me that digs packaged stuff like this, but I also love to pose and have characters standing around in different poses and kinda mingling together, which is why I stick with loose more.
I forgot to post this here when I took it, as I was doing it for a Godzilla group I'm in, but I took the time to setup the nearly complete collection of NECA Godzilla's. This is every regular figure (Though Rodan is not shown, because it has loose wing issues that I only fixed today, and I haven't opened my 8 Bit Godzilla, it's still in the box), and all the poster boxes they've made as they had to shut down after losing the license to Playmates, which is such a shame as the Biollante and Tokyo SOS Godzillas are up there as some of the best they've done to me. The only figure I don't own out of the NECA line is the 24" long 2014 release of Godzilla, which I'll try to buy some day, as I'm hoping to find it when I get back to going to the flea market or conventions, as it's not a very pricey figure loose, maybe 30 to 50 bucks which is very reasonable.
I redid my whole Godzilla collection after I did this picture, so I'll post up a new shot of that eventually as there's a couple details I have to finish in regards to how I display the boxes and getting all the figures to fit lol
