This build is cheaper, and will perofrm MUCH faster. I added the i7 3770k CPU, which for video editing will be seen as an 8 core CPU and will make your video eiditng life much faster. On top of that, I upgraded the GPU one step to the 570, which will give your HD video editing a boost in speed. Instead of corsair, I put a seasonic PSU, the very best. The HAF case is the best mid tower case. If at all possible, go for 32 GB of memory eventually. I have 16GB and will be upgrading to 32 soon.
EDIT: Added Blu-Ray writer, as the one I added was not one.