Even though all kinds of various little problems could occur with ANYBODIES PC, this build is based off trusted long lasting brands, great customer service and out standing performance among tech benchmarks.
There are a few ways to drop the cost on this build.
Most immediate to me is the overkill PSU, you in no way need 750W on this system. I doubt that Crossfire/SLI is going to be a concern. I advise dropping down to this 550W unit.
XFX Core 550W. $70 ($10 rebate) http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Modularity is a useful feature, makes cleaning the PSU easier as you dont have to disturb any cable management. Though at this kind of budget, the extra $20 for modularity can be spent better elsewhere.
You cant overclock on that CPU, so a Z77 board is fairly pointless. Also you don't need some of the other features of that board (such as Crossfire/SLI support), so there is no point paying for them.
This board will do fine.
AsRock H77 Pro4. $80 http://www.newegg.com/Product/Product.aspx?Item=N82E168...