The Alienware X51 is back, in a newly revised "R2" edition. The closest thing you'll get to a high-power PC in a console-like form factor, the X51 packs unfeasibly high levels of gaming power into a ...

Alienware claim that you can "easily upgrade your core components to keep pace with the latest games and digital entertainment", but it seems to us that upgrading the X51 might be a trickier minefield ...