I have decided on the 550W, but i still aint sure bout the gfx card. my ATI choice wasnt on the link given, which is 512mb and DDR3, whereas they only showed the 512 DDR4's, which were FASTER than the Nvidia by quite a way. This makes me suspect that my ATI choice would be barely slower, if at all, and i am just not sure if that 25 quid id worth it for such a miniscule performance hop.