You will get it then without a single problem. The mobo is enough for you if you are not planning to oc it. A good mobo can give you a better performance as well and better built-in audio as long as its got a new Realtek alc1150 (msi z87 gd65 or asus maximus vi hero) but it meana dropping on cpu or gpu. I would stick to what you have got on the list right now as processor and video card are the main components for gaming.
Or save a bit more and have it all at one go. Its all up to you. The build you have got now will do well for at least 2-3 years maxing every game at 1080p and it shouldnt drop below 60fps even after 3years(definately over 40 which is still very playable) unless suddenly something will change and they will start making games on totally new engines etc. Go for it if you want, but in the future i would also add at least 120gb ssd which would be great too. All i mean is that you have got top spec cpu and gpu, very good psu and case, ok ram and hdd and average mobo.