How good is a less than £600 Steam Box PC!
My PC Components: http://astore.amazon.co.uk/fr013-21
PC from Aria: http://goo.gl/dSyZNY
PC component comparison: http://www.cpubenchmark.net/
PC Specs:
7790 - 8GB Ram - Gigabyte Motherboard - Wifi / Bluetooth Receiver - 128GB SSD - 500GB 7200rpm HDD - Intel G2020 CPU - 5 free games - AMD Headphones - (Windows not included in price) = £549.95 / $860.18
(Please use these specs and the video as a benchmark. If you build a PC yourself, you can of course get components cheaper as you are not paying for the time / effort put into a prebuilt PC!)
Games Covered: Far Cry 3 - Black Ops 2 - DayZ - Battlefield 3