ASUS Maximus V Gene LGA 1155 Intel Z77 HDMI SATA 6Gb/s USB 3.0 Micro ATX Intel Motherboard
$199.99
http://www.newegg.com/Product/Product.aspx?Item=N82E16813131830
This would be an excellent board for your sons computer reuild , it has the ROG software and features and it has two x16 slots if running two video cards is an option at some point. It also has the Lucid Logic MVP which combines the onboard graphics with your video card for a 60% graphics boost if your not going to se the second card option. Between Black Friday and Xmas there is bound to be a sale or rebate offer and you can end up with a lower price.
I have had Asus , Gigabyte and MSI and of those I always come back to Asus , they make a solid stable board that has a ton of features and the actual board is solid.
I think Gigabyte makes the heaviest boards of any and you know you got something very solid , although they are still second best and have had severeal issuse with just about every Ggabyte board I've had.
The MSI boards are the opposite in that they are very thin and flimsy , I as putting a water block on the cpu out of the case and the board was bending to the point I had to take it off and tighten it in the case when attached to the MB plate , very flimsy. Maybe they use good chipsets and caps but the skimp on other things and this was one of thier top models the Big Bang X-Power.