That's a top quality motherboard, but it doesnt have on-board video. That would mean you HAVE to buy a video card immediately. My suggestion of the A8N-VM CSM, allows you to hold off on that purchase until you have enough cash to get a good gaming video card.
I've done a good few builds with the A8N-VM CSM, and it's a top quality board with LOTS of features given its small size, PCI-Ex16, 4xSATA ports, 2xIDE channels, DVI and VGA out for video, Surround sound built in. The only thing it lacks in comparison to the A8N5X is more standard PCI and PCI-E x1 slots. But wih so much on-board already, do you really need more of these?
By all means re-use your existing case, or buy a flashy one. In that case, the X-Clio power supply you picked out is a top quality one.
"Take up our quarrel with the foe:
To you from failing hands we throw, The torch; be yours to hold it high.
If ye break faith with us who die, We shall not sleep,
though poppies grow, In Flanders fields." - John McCrae, May 1915