motherboard i would say skip the asus brands i have had a really bad experience with rampage IV extreme which was about 2000 qr and the best on the market :/ its shit
and i would recommend you the 780 classified its amazing <3 its powerfull plus looks awsome <3
and the powersupply should be enough just make sure to get the one which has removeable wires i don't know which series that is and don't get the platinum get the dominator GT's the platinum are too overpriced or you can also get the samsung green rams which are also really good