I'm probably gonna get a new moniter with this build so it will probably be 1920*1000. I am geting the Rosewill CHALLENGER Black Gaming ATX Mid Tower, so I thought the pre-installed fans would be enough.
On a 1920x1080 the 7850 will work well.
Case fans can suck. My case came with only one fan. I bought two more and now my systemvis very cool all the time. Make sure to have a side fan. It'll make a huge difference in GPU temps, and cools your motherboard.