What hardware for Revit?

We have understood that the most important things for Revit, regarding hardware…, is a great graphic cards (as the ones for gaming), fast HD, a lot of RAM.

Any opinions?

The PC we are buying at the moment for Revit is:

GTX 780
Fractal Design Define R4 Black Pearl
Corsair TX 650M, 650W PSU
Intel Core i7-4770K
Corsair H100i Hydro Series CPU Kjøler
ASUS SABERTOOTH Z87, Socket-1150
Crucial DDR3 Ballistix Tactical 32GB
Gigabyte GeForce GTX 770 2GB PhysX CUDA
Samsung SSD 840 EVO 250GB BK OEM
Seagate Barracuda® 1TB
Microsoft Windows 8.1 Pro