2133 MHz ram will have no appreciable benefit over a set of 1600Mhz ram at the standard 9-9-9-24 timings.
Why two SSDs? Can just make a C: partition on the larger one.
Two 670s (or better yet two 7970s) are a better price/performance value. But, you didn't say how many monitors and what resolution. A single 670 maxes most things today at 1080 ultra (Crysis 3, Far Cry 3 are exceptions).
850W PSU is the max you need (really could go with a 750). Why Platinum? You'd have to run it under load for the better part of a day for many years to make up the price difference from Bronze (assuming you pay US-level prices for electricity - BUT it's worth it if you find it on a great sale). See this: http://www.extremetech.com/extreme/143029-empowered-can...
Why would you want to write BR disks? Slow and expensive compared to an external HDD.
Well, congrats anyway It's not what I'd recommend but it's certainly very nice.
If we were playing BF3 side by side on 60Hz 1080p monitors with adaptive vsync on, you wouldn't be able to tell them apart. My total build cost was $1300. On the other hand, if you have three monitors or a large 1440p monitor yours will smoke mine. Would also whip mine in C3, FC3, etc.
I was more concerned with the best balance of performance to cost at the time.
Again, have fun and be happy with your sweet system.