> Given the small case, modest PSU and absence of fans

I searched for images of the motherboard used, and it would seem to support 4 RAM slots and one each of PCI Express X 1 and X 16. It would probably still be cheaper to buy this PC and shove the components in a larger case (around £30?), maybe buy a fancy graphics card (the motherboard doesn't support "crossfire" and whatnot for /really/ fancy dual-graphics card setups, but you don't need that for video editing), than buying all the components from scratch.

David Hicks