- Double the memory to 32 GB.
- Change the GTX 680/4 for a GTX 760 or even a GTX 670.
- Change the Mid Tower for a Full Tower.
- Add another disk.
Cool, thanks. RAID enable the disks?
You may want to look into a hex core rather than a quad core.
It's a good build overall, better with cc's suggestions.
I'd recommend two more disk, though.
Plus some type of external backup.