My concern is with your case, PSU and graphics card. Make sure that graphics card which is 280mm will fit along with your PSU which is 160mm + modular cable extrusion.
Your case states that it supports: "ATX PSUs, up to 160mm in length (To fit in combination with a long graphics card, PSUs with modular connectors on the back typically need to be shorter than 160 mm)"
It also states that it supports: "Graphics cards, up to 310mm in length, when 2 HDD brackets are removed (Graphics cards longer than 170 mm will conflict with PSUs longer than 160mm)"
Make sure all will work with the above constraints. When I build a mini-ITX with an enclosure I haven't used before, I always buy the case first so I can make measurements myself and generate ideas. You don't need such a large-capacity PSU - that PSU is also pretty long (160mm) see if you can get something shorter like 150mm (ATX can have different lengths) and modular is a must.
If you plan to overclock then definitely get the Asus P8Z77-I Deluxe. Forget the Gigabyte, ASRock, Zotac, or anyone else who is selling mini-itx boards that don't have robust-enough VRM for a long-term stable OC. Those other boards are really just glorified HTPC boards. The Asus is a solid overclocker and has an excellent board layout.