You do have a sweet setup there! :cool: All the parts are meant to be OC'd... including the graphics card...
So, for start I would suggest you to forget any factory presets (from OS or BIOS) and take your time to learn your system... in the Maximus series mobo section of this Forum you can find general descriptions about OC'ing (stickies) - I strongly suggest you to read those first! Be sure that you understand everything, you can come back and ask if something is not clear enough...
Then, you can start... only thing you have to keep in mind is that every component is individual in the sense of OC'ing... there are no setting which will work for everyone... and the temperatures will be your ultimate guide for the max limits...
After you read through the guides, the next thing you should do, check your temps at stock settings... maybe post them here, together with your ambient temps... - then we can see how much higher you may go...