Casual gaming steam box

I want to build a pc for casual gaming on a 720p tv and I wanted it to be as small as possible as there is not a lot of room left around my tv. I have thrown this together

the 5800k is a placeholder for the 6800k which suposedly comes out next month. My main concern is heat, does anyone know of a good low profile cooler for this cpu?

I plan to put this build in a bigger but still small itx case at the end of the year with a dicrete gpu

Noctua NH-L9a