that 780i mobo is the same one I'm getting for my new build, its pretty much top of the line, other then the new 790i mobo and a few others that are much more expensive. But there would be no real point to get it unless you are going to go sli in the futur, same with the 680i mobo, if you aren't gonna be using sli get a cheaper one.
3770K @ 4.7 Ghz H100 Water Cooled | GTX 970 MSI Gold Edition SLI
32GB G.Skill RipJaws (Rendering/ Virtualization) | Corsair 650D | CORSAIR RM1000W w/ White Cable KIt
Samsung 850 Pro 256 GB SSD Boot | OCZ Vertex 3 240GB SSD Secondary | WD Black 1 TB | WD Green 3 TB
Server: Core i7 920 | 8GB RAM | Intel 240gb 730 SSD Boot | 3 x 2TB WD RED | Fractal R4