I plan to overclock and not add a second GPU. General gaming with this PC
Then 750W psu is too much. Get a quality PSU from Antec, Seasonic, XFX, Corsair or PC Power and Cooling, Silverstone. ~ 550w. At least 80+ bronze quality.
Also, i5 Memory Types Supported are DDR3-1333 DDR3-1600, so no use of 1866MHz ram.