i went with i5 4690k . got it overclocked at 4.7ghz now. Itching to get an Ek waterblock for my gtx 970, but don't know if its worth it to watercool. I watercooled my old video cards in the past for more overclocking but the 970 already is a beast.
http://www.performance-pcs.com/ek-fc...el-acetal.html