Damn, now you have me on the fence again. I wanted to ikea units but I couldn't stand the wasted space. Now, that you have them up they look clean and are a lot taller than what I have currently. Crazy thing is, to fit what I have I would need almost 2x the amount of those ikea shelves just because of the wasted space and not sure if I have room for that. That said I am still eyeballing some for all the collectors editions I have for at the moment I just have them lining the tops of all my shelves and its an mess.
That said, great stuff and looks like you have a lot of snes games to cover =)