I plan to get an Antec Three Hundred for a computer case. It seems like a good case for the price. I believe it is the highest rated case at newegg, too. It has 5 out of 5 for a rating with nearly 2,200 reviews and ratings.
The GPU I plan to get is a Gigabyte Radeon HD 7950. It is 11.4 inches long. That Antec case can hold a GPU up to 12 inches long. It might have space beyond 12 inches by just a bit, I think the guy from Antec told me it is about 12.4 inches, but you wouldn't want a GPU that is any longer than 12 inches; a card that long would barely fit in there.
So with this GPU I want being 11.4 inches long, I have about a half an inch to an inch max of space. Is this cutting it too close? Should I get a bigger case? My concern is that it'll be hard working with wires; working them around the GPU.