title:[Build Help] A semi-gaming computer advice needed, first time builder

Hi, this is my attempt at trying to choose parts for my first self built computer. However, I'm not exactly sure on how to pick a power supply and the current one I have chosen was kind of on a whim. If possible could anyone recommend me any budget power supply? Also if possible could using the PC generator website it came up with this: http://choosemypc.net/ca/?budget=700&oc=false&options=od and if anyone could tell me how much of a drop off will there be compared to the one I have chosen. Thanks in advance, please forgive any formatting problems I have first time posting here.

Build I have chosen: http://ca.pcpartpicker.com/p/3kqxWZ

Games that I would like to play on this computer: Skyrim, League and Tera (not necessarily max settings, even mid level will be fine)