All this performance comes at a cost of course. And that cost is both financial and in longevity. At £1,687 inc VAT, the Rock Xtreme 620 is by far the most expensive of Blu-ray equipped laptops we've tested. You won't be able to use it for extended periods away from the mains, either. The MobileMark test showed it will last around two and a quarter hours when unwired.
The Rock Xtreme 620 is something of a curate's egg – good in parts such as out-and-out performance and in sensible build and styling; but hindered by a disappointing screen quality and poor battery life. If you're taken by the idea of the 620 but don't need BD playback, you can configure it without for £110 less.