Your collection looks excellent. I love how neat and tidy it is!
You have a lot of good MVS games already. Specially the Metal Slugs and Crossed Swords.
Are you considering getting Shock Boxes for those MVS carts? It add a lot more cost but they look great.
Yes, I am thinking about getting some kind of cases for my MVS carts. While I do like the look of the SouthTown Homebrew shockboxes and inserts, I think they're really quite expensive.
The neominiboxes are cute too though, but still not really cheap. In the end I'd like my MVS carts to look better on the shelf but for now I think I'll use that cash to buy some more games ;-)