1. I have family who works for Intel. Got a smoking deal on the 5930k that I couldn't say no to.
2. Had initially purchased an Asus X99-A, however it failed to power on, no LEDs were lit no nothing. reseated it, no joy. Exchanged it at Fry's. Second one had a BIOS error and wouldn't get me in to the BIOS to correct it. Exchanged it for the MSI one and had no issues.
3. There are only 2 good companies that make the actual memory chips, Micron or Hynix. Any manufacturer that uses one of those two brands to make their RAM sticks will produce a decent product.
4. Had good luck with them in the past. And it's one of the parts that I carried over from my old build.
5. Same thing here. I've had them for about 1 year now. 9xx series video cards just don't interest me enough to make the jump from what I currently have. My gaming is done at 1920x1080, so I'm ok for now with the 2 x 770's.
6. The SATA connected Samsung 840 EVO can only do a max of about 550-600 MB/s (not counting RAPID mode which is glorious for benchmarks). The PCIe x4 Samsung XP941 meanwhile can hit about 1500 MB/s in the Samsung Magician disk benchmark. It's all about speed