If this is primarily a gaming rig, theres no advantage over an i5 in the i7. You could save money there. Save some money and get an i5 2500K. Even in productivity type work the 2600k advantage is not very substantial.
You also don't need 16GB of RAM, 8GB is plenty.
The Power supply? seriously? insanely overpriced and overpowered:
i like the look of that PSU and will change to that.
However for the motherboard i really wasnt looking for an 'expensive' motherboard as much as i was looking for one that 'wasnt cheap'. If you know of a motherboard that is compatible with this system for much less i would be grateful!