I'd honestly take i7babys build.
Drop the case to the z3 plus ,& up the GPU to the 280x I posted - you're back in budget then & that's a solid high/ultra gaming rig.
If you want to go with the 6300 for some reason ie.you have a penchant for amd or would like to tinker with over clocking etc. Then the build I posted is solid.
The themis is as good as the 212 evo,is cheaper & is easier to fit.stick with the GB board for amd builds always & either way definitely stick with the xfx psu- there's simply no reason not to.