Looks Ballin. Now this is more of a "Upgrade build". The 7850K is a somewhat entry level CPU with r7 250 graphics.
You'll want to upgrade as soon as your budget allows to a Mid-high end dedicated GPU. I wouldn't even worry too much about losing the iGPU.
Yeah,as soon as i can im gonna upgrade to a 260X, which should be enough for any games i wanna play, (battlefield 4, CS:GO, Gmod, etc.) the 250 is good enough for cs go but i'll have to upgrade to the 260X if i wanna play bf4.
I'd upgrade to something even more powerful just so you Don't end up having to upgrade AGAIN in a relatively short period of time. GTX 760, r9 280 might be good choices.