I would suggest that you don't get a 6850. It will use a lot of power and not be very powerful compared to newer cards. I would save money on the case and HDD and get a 7850 instead. I would also not get a a 10000rpm HDD. its a waste of money. Its not going to be any faster than a 7200rpm drive. For $70 you can get a 500gb or 1tb drive instead.