Dude wow! That's crazy! What does 64GB of ram do? I'm running a 4770k with 16gb of ram ATI7970 with 2 1TB, 2 500gb drives a 256gb SSD and a 1TB usb 3.0 external. I really don't know what RAID is, I have some vague knowledge but not enough to know to use it or not. Mines pretty quick in Lightroom, prolly not as quick as yours, although I'm running 2 27" 2560x1440 monitors which is tasking. But congrats on that build I'm jealous!