Nice list, that's going to be a very very nice rig.
Honestly, I doubt both my solid state and my HD drive are going to fail at the exact same time. if one fails, I always have the other. I think spending a bunch of money on backing up more than once is a mute point for me in college
Let me continue on my point for RAID, but I'm not going to push on that topic too much more because you don't seem too interested in it. It is very likely that if you have music or video that you don't want to store it on an SSD. It's a waste of space that can be used for things that actually need to load fast. For example, what I do is I installed Windows and Applications on the SSD. I store downloads, music, and video on my RAID-5 as well as intermediate backups of the RAID-0. Then I have an external 1TB drive as a secondary back-up of the RAID-5 and the RAID-0. So whenever something fails (the SSD, a regular HDD, or the external backup,) a minimum of 3 drives must fail before something really bad happens. Granted I have 6 disks between the two SSDs, the 3 1TB HDDs, and the 1Tb external (I need to upgrade this to 2TB in the near future.)
It's a matter of the data you are going to store. If you don't download a lot, or have many documents, pictures, music, or video, it most likely isn't neccessary but as the amount of data increases on your computer and you start adding things like pictures that you or someone you know has taken, your heart will sink if hardware fails and there are files that you will never see again.
Personally, I would be devastated if I lost all the pictures of my daughter since she was born which is half of the reason why I have RAID-5 + an external backup.
Also keep in mind that an external backup isn't usually current because you only backup occasionally. So you can still lose files. RAID-5 gives you an opportunity to save files before more than just 1 drive fails. I think as you use your computer more and more and you put more and more stuff on it a solution like this will make a lot more sense, but until then it doesn't.
I've seen people hit 4.5Ghz with the 3930k and I've easily been able to do 4.5ghz on my 3820.
SB-E has been under-estimated IMHO and even the 3820 is a heck of a CPU. It exceeded any expectations I had of it. In fact it blew them away and I bet that the 3930k is even more impressive. I almost got a 3930k myself, but I didn't want to pay twice as much for only 2 more cores, which is why I'm using a 3820. Plus, the stock 3820 performs somewhere between the 2600k and the 3770k (in most cases, some tasks it can do better.) so I have absolutely no complaints.
Good luck with your rig. It is definitely "built to serve."