Went with the 6600K in case I want to have some fun overclocking and to be on the latest and greatest processor/motherboard.
For cooling I initially started with the good old Hyper 212 EVO but switched it out for two reasons: one, the idea of hanging all that weight on my motherboard just turns my stomach. Two: why the hell not go water cooling; it just sounds awesome.
The graphics card: I really just want to be able to play with the oculus when it first comes out and I'm pre ordered for March so couldn't wait for Pascal. I'll probably sell the 970 and get a new card once the prices settle. The lack of HDD; eh, I'll probably put one in later, I have an old one laying around.
Finally the case; I started with a Corsair 200R, then read that the 300R had better performance, but (in my opinion) just could not hold a candle to the looks of the R5.