AMD is good for low budget build. With an $1800 budget, go with an Intel CPU
Go with i5 4690k
Those case fans are the wrong size; according to newegg it needs 200mm front fans and 140mm rear fans. Additionally, I don't think the case even has room for 4 more. It looks like there's only room for one more on the side
Before spending extra money on a 144hz monitor, know that depending on what games your playing, you might not even be able to push much more than 60 fps on max