The R9 280 looks to be the cheapest bang for buck on graphics cards. How do you know what power PSU to buy? I was thinking £50 600W Corsair should do, 125GB Samsung SSD, the i5-4570, 2x4GB Corsair Vengeance Ram, a cheap large tower but cant find a descent motherboard that has wifi built in, I like the price and performance of the Z77 boards tho.