IDK about the X99, it looks pretty pricey. Not to mention the wattage. I already purchased a 760 Watt PSU so I'm limited by that. I'm planing to put an SLI setup so I'm not sure about loading it much more. I'm debating an i5 6600 or an i7 6700. I don't plan to overclock so I don't think the K series is worth the premium. Or is it?