Youv got the idea of it down pretty well, just some small things.
You have a locked processor and a Z77 board, basically the mobo can overclock and the CPU cant. Wanna upgrade to a k edition CPU if you want to take advantage of that.http://www.newegg.com/Product/Product.aspx?Item=N82E16819116504
Otherwise downgrade the mobo to a H77 Pro4.
Would get slightly faster RAM personally. This kit is also low profile so yo can get as large a heatsink you want on the CPU without fear of clashing with the RAM.http://www.newegg.com/Product/Product.aspx?Item=N82E16820231544
Unless your covering for the possibility of dual Crossfire/SLI later on (which the board supports), you dont need a 750W PSU. A 650 or even 550W will be fine.