Nice setup, but its a shame to hide her under the desk.
Don't forget to check to ensure your MoBo can support a 125W CPU that the 8 core AMDs require before attempting to install. You can of course look into a better GPU, but unless you've got Fury's in X-Fire, everyone can say that. The existing one should hold up fine for where you're at.
Make sure if you end up needing to buy a new MoBo you get one with a nice big VRM for overclocking, the 8 core chips are great, you should be able to get at least 500mhz more out of them. You're on liquid cooling, so probably closer to 700mhz-1ghz additional.