Very nearly purchased this, but ended up spotting this, a bit more expensive but quite a nice machine for the price:
£380
MEDION® AKOYA® P4323 D (A622) (REFURBISHED)
Intel® Core™ i5-2300 Processor, Genuine Windows® 7 Home Premium, 2TB HDD, 4GB RAM, NVIDIA® GeForce® GTS450 DirectX® 11 graphics, MEDION® Data Port 3 for USB 3.0, WLAN
I've had a Medion in the past and liked it, so should be alright - got a guarantee on it as well.