I came to your house and quietly took pictures of your rig:
Jokes aside, I started to build this rig in June, and I have just ordered the final pieces: the GTX 780 Hydro Copper, an additional 140mm fan and a 140mm super-thin rad (under 30mm) to fit in the back (I really want it inside, but if that doesn't work... well, we will see. I already have a 240mm thin rad up top with a bay res and a loop nearly identical to yours (for now). It really seems that with our parts, this is the most reasonable way of doing it. Since I took these pictures, I have added a 200mm fan up top (back) and another 140mm next to it. Moved the color shift 200mm to the side as intake. All fans except the color shift fans are controlled by NZXT Sentry 2 fan controller, which was a great deal for a mere $30.
I don't mind waiting this long to build it, as I'd rather get things right then have to deal with components that don't fit (and I've STILL had my fare share of that in this case... no pun intended).
Apologies for hijacking your thread, I saw your post when researching what can fit in my case and found this instead - it looked so familiar I had to post. Couldn't resist. If interest is expressed, I will come back and post more on the progress. Cheers!