Arma is known for being a pretty cpu-bound game, so I would go for a Skylake build. Something like this will do what you need it to do: [url]http://pcpartpicker.com/p/wWC9bv[/url] It only has 240gb of storage because I feel that with the steady decline of SSD prices it is better to get a 240-500gb SSD now, and add in a mechanical drive later for mass storage since a 1TB can be picked up for as little as $40.