It runs on an i7 and Crucial M4 - gave 3GB of RAM to vBox. Graphics is generic but it does the job. I installed the extension pack and the guest additions.
This setup beats double boot by far. I am going to dismantle the double boot on my laptop because it is driving me nuts. Boot is at least 10 times slower than in vBox - and it is on an i5 and OCZ Vertex. Will install it on an external disks with the Vertex removed.