Quote from TragriCPU I'd change to an AMD if I were you. I got the AMD FX6300 for my rig. As opposed to your quad-core 3.4GHz, it's 6-core, 4.1 GHz, and cost £80 (~$100 cheaper than the CPU in your set up). They seem to be more geared towards gaming builds as well, whereas Intel are more work station processors.
Core speed and clock count aren't everything for a cpu. The intel one he has selected is actually a fair bit more powerful than yours, especially when overclocked.
Get cheaper memory, speed makes bugger all difference.
Swap out the h100i for an NH-D14 cooler by noctua, keeps temps about the same, just as quiet (or more so with the stock fans on the h100i) and cheaper.
Move the power supply down to a quality 650w instead of the 750w. Unless you're going SLI in the future there's no need for a 750w one honestly.
Rethink your choice of keyboard and mouse too, the keyboard is just tacky and not worth the price while the mouse has some quality issues - from my experience with the mamba and deathadder they tend to die pretty quickly. I actually really liked the deathadder apart from the build quality. If you don't mind buying a new mouse every year or less then go ahead but it's something to keep in mind.
Consider changing the monitor to an IPS display, much better quality colours and viewing angles. Little bit more pricey though. (but worth it IMO)