I have one picked out already, and I do plan on overclocking int he future. Is my current selection good enough? Should I upgrade/downgrade? Let me know what you think. :D Thank you!
The power supply you have there is perfectly fine and recommended. The only suggestion I would make, if you can afford it, is upgrading to the Kraken X62. Other than that it's a fine looking build. The 750w is more than enough for what you'll need, even with overclocking.
With a 750 watts, you can add another 1080 and overclock everything to the max and still be perfectly fine. If you are not planning on adding a second 1080 a 500-550 watts would be fine.