Corsair Obsidian 800D. Pretty expensive, but a very large case. Excellent build quality and cable management.
The building process in any case isn't terribly difficult. The challenge begins when you're trying to arrange your cables in a nice and neat manor. There are several cases that boast "excellent cable management", but I don't think I've seen anything better than the 800D.
Here's a couple snaps of my rig (specs in sig):
After I was done building it, I felt like I was forgetting several other components, just because of how neat and orderly everything was with almost no effort put into the cable management.