That case is a little aggressive looking for my liking. I'm more into sleek,
modern simple designs
like my Lian Li case. But it seems like a nice enough case, and if that's your thing then I'm sure you will be happy with it.
As for moving parts into a new case, I don't really have any advice. It's basically like doing a new build except all your components will have dust all over them.
As for SSDs, I didn't know you could only install the OS on there. I haven't really looked at SSDs very much since they are so ridiculously expensive.
Edit: Sorry, I didn't mean "modern". That implies that I think your choice isn't modern, which isn't true.