I just built a very similar machine for my Son, (specs in my signature), and have to say it's a very competent mid-range gaming rig. The 7700K can run a bit warm at full load so the H100i would probably be a good choice. I went with the Cryorg H7 which is sufficient to keep temps below 80 at stock clocks under load with Prime95, however, I likely couldn't OC much with air cooling and keep temps below 100. If you're not going to OC water cooling really isn't necessary. If you're going to spend $180 on a case I'd at least consider the Phanteks Enthoo Luxe. This was my first build with a Phanteks and I was quite impressed with the quality and the engineering. My Sons loves the RGB illumination also. Using a RGB Gigabyte MB and keyboard everything pulsates with color.