Instead of a 3Tb drive get an SSD. Unless you're doing video editing you'll never use the 3Tb, and you'll appreciate the speed of an SSD. Get a 3Gb or 4Gb version of the GTX 1060, at you'll never use more than 4Gb at 1080p, if even that.
<edit> before anyone kills me for it. In most games a 6Gb...