Yes, you are really get me a hard time, unfortunately there is not good micro ATX MB for OCing the FX8350.
Because you use the Bitfenix then you maybe take other cpu like FX6350 or 6300 with the micro ATX MB.
Also I add the link for "build water cooling into a mini-ITX gaming PC", it is good article. Check it out. http://us.hardware.info/reviews/3394/workshop-build-water-cooling-into-a-mini-itx-gaming-pc