Fractal Design makes excellent cases overall. I went with them for my recent build, and aside from the front accessories port cable being a little short, I felt like I recieved excellent value for what i spent. it should have more than enough airflow for your needs; however keep in mind that the more vents a case has, the better airflow/cooling it will have, however it will let more noise through. the Deep Silence case is more expensive because it has that acoustic foam lining the insides to make it more quiet. a Modern i7 and a 980 should have no sweat operating in a marginally unvented case. the Maxwell architecture from nVidia is very efficient for it's power, same with modern Devil's Canyon or skylake chip. secondary noise generating areas to pay attention to is storage; most mechanical drives generate more sound than the sum of the rest of the PC's fans put together, including the quiet ones. also, a 80+ gold PSU with PFC and fanless operation rated for high temps (EVGA Supernova G2?) will operate with less heat generation, often running completely fanless, and due to high temp tolerance will not be affected if there's a ventilation issue in the case. get a big, meaty Cryorig or Noctura with nice, quiet 140+mm fans or even some liquid cooling solutions can help assist in making the machine nearly totally silent.