Personally, I'd look on PC Part Picker at some of the build guides they have there. Personally, I run an Intel i5 4760k, 8GB DDR3 RAM, and a GTX 760 w/ 4GB DDR5 vRAM. It runs great with lots of visual mods.
That reminded my of my OSIRIS-REx Cobalt called chibi.
I looked up chibi Atlas V and just got furry stuff. Nothing remotely related to aerospace. *shrug*
On topic, love Surveyor!