I wouldn't cool the VRM of the MVF; it uses 3/8" barbs, not G1/4" threads. You would have to lower the tubing size coming out of the CPU block, causing major flow restrictions, and generally decreasing performance in the loop. The alternative is to get a fullcover waterblock set from EK (the only known producer of MVF blocks, at least to me), which will allow you to use regular G1/4" compression fittings.
840mm of rad space is insane for a single 3770k, 7970, motherboard, and possibly memory. ABSOLUTELY INSANE. I like you for that :)
For the CPU block, EK Supremacy blocks are great, if you will be using EK blocks for the mobo, memory, and GPU. I like to keep the aesthetics constant throughout the build, so if you are using an EK CSQ-style block for something, then I want to keep the other blocks EK CSQ-style, as well. Just a personal preference.
For the CPU block, I like the Swiftech Apogee HD, and the EK Supremacy. EK now has a mounting mechanism to allow for direct-die mounting for Ivy Bridge CPUs; you would have drastically lower temps from a delidded 3770k with a waterblock mounted to the CPU die. Whatever block you get, I recommend getting the mounting kit from EK.
I am trying not to sound like an EK fanboy, but I also like the EK GPU blocks; they actively cool the VRM and memory on the graphics card, unlike the/some XSPC blocks. I like the clear EK blocks, as well; the nickel and copper blocks are really nice, in my opinion.
XSPC makes some great memory blocks; EK only makes Corsair Dominator blocks, to my knowledge. Depending on what RAM you have, your memory block decision will be made.
Still, sweet mother of god, why 840mm of rad space?!?!? I appreciate your insanity.