This is mainly a looks and personal preference thing.. but if I were to have such high end gear like a 6600k and a 970 I would want a bigger and better case to house it all it. That provides better cooling, ventilation and space for upgrades. And also a nice window to show it all off!! 😛
Its kinda like putting a V8 engine inside a beat up old car, haha. I'm not saying its a shit case. It's just basic, and you have yourself a high end system here