Ill try keep it short and simple.
CPU - i7 4790k, great processor with decent overclock ability (my chip atleast) I was able to get a stable 4.7 while maintaining 1.275 volts.
GPU - These things are monsters and overclock like bats out of hell, they are both currently oc'd to 1375 on the gpu clock and running a light overclock of 7400 Mhz on the memory, they stay very cool thanks to my EK waterblock. I have both cards flashed running skyn3t bios with the voltage bumped up a bit.
Memory - G Skill Trident X runs great @ 2400mhz, no instability issues.
Motherboard - I usually go with Asus high end ROG boards but they still have none out for the Z97 chipset, I have heard great things about this Gigabyte board and with the built in waterblock I could not pass it up, also the ability to run SLI @ 16x for both cards.
SSD - It is a EVO, works great super fast.
Case - Corsair 760T this is probably the best case I have owned, cable management was easy and I LOVE the doors.. (I HATE THUMB SCREWS) Plenty of space to watercool.
Watercooling - EK 140 Res with D5 Pump , SwiftTech 240MM Radiator , SwiftTech 360MM Radiator, 2x EK 780 Classy Waterblocks , EK Supremacy CPU block , PrimoChill 3/8 x 1/2 tubing and a mix of fittings including Koolance and Bitspower.
Use - I use it for gaming and benchmarking, plain and simple! I work on my work computer :)