A 360 rad will fit nicely in a obsidian 800d. Personally I don't have a 360mm in my obsidian 800d, but I can tell you it should fit without an issue. As for the window that reaches all the way to the bottom, my cables don't really show, if you bundle them up, and then wire them behind the motherboard plate (it has quite a bit of space) you can have most of it out of sight. The obsidian also comes with holes for tubing in some essential places, I have my pump in the same lower compartment as the PSU. I would take a obsidian 800D, as a 360 will be a tight fit in a CM stryker, and might not fit. For 160Euros I would take it if I were you, it costs ~250 euros new. But there are other cases out there.
Hope this helps!