Thats a tricky one.
The only real change to make would be to drop the 1866mhz ram to 1600 but that only gives a saving of 10$ or so.
If you want to knock money off then lose the SSD. It is not needed in a gaming build, what it helps for is loading time and OS boot load so you can do without it.
After that, If you're still looking to knock some money off you should probably look at changing the CPU + Mobo or GPU.
Either scale them down slightly or look into the AMD route.
Final thoughts would be if your budget allows for your original PC part list,
Swap the 1866mhz ram for 1600mhz and swap the 500gb HDD for 1tb one.
http://pcpartpicker.com/p/2U3bP