I keep mulling it over. How fast does it really need to be though? Couldn't you be set with a 5820K and one high end GPU?
I guess if it's for work though it becomes a tool, so if the work load is profitable enough the cost of the machine becomes less significant. One could argue that I could buy Lowe's or Home Depot's house brand of tools, but I know they aren't good enough for the longevity of my work load so I spring for the Hitachi, Makita, Milwaukee, etc.