There's not much to be done here, the best build is between tiny voices and e_X.
Just put the corsair cx 430w(it will do) and most components from tiny voices, with the ram of e_X (the mobo and cpu supports 1866) and he seagate, perfect amalgation.
I say you go with Tiny Voices' build. Pretty solid considering the budget. If you want to run Minecraft a bit better though definitely invest into a discrete video card. Try this for only $30 more. http://www.newegg.com/Product/Product.aspx?Item=N82E168... It'll be a lot better than integrated.