@Craig: yes your configuration will work fine. However for 4K, it's not just the RED Rocket that counts but also the graphics card (e.g. Nvidia). A low-cost graphics card will not have good transfer rates for this, so consider buying a 4800 if you want problem-less display and grading of 4K files at 1:1 scale.
BUT!!! It's not necessary if you think about it.. Your screen will not be able to display 4K anyway. So what you can do is use the downscaling option in MIST and display at 2K which is something that most graphics cards can do without a problem nowadays.
There is a Dynamic Resolution option in MIST that will switch dynamically to 2K during playback/grading and back to 4K when you stop. In other words, you don't need to empty your pockets when you do not necessarily need to....