Here's my spec, a few hours before I start pulling the trigger:
CPU: i7 4900k
Motherboard: Asus Z97-Deluxe ATX
GPU: GeForce 980 Ti
Then DDR 3-1866 memory, 1000w power supply, Phanteks case, liquid CPU cooler, 2 512gb SSDs and a 3TB HDD.
I explored exotic options like PCIe SSDs (wish those were possible) and SSD raids. They introduce complications beyond what I think my builder and I can surmount. Also, for now, if it's a Hackintosh, it stays a generation behind. The i7 6700 isn't working yet, nor are X99 boards.