Fuck yeah god-tier Seasonic PSU right there...
But your case fits full sized graphics cards, I'd just wait for Pascal.
Here's what I'd do if I were you, I'd buy this build below now and then add an X80 to it when it's released. Don't listen to anyone who tells you the 400W PSU won't be enough for the x80 they're wrong, it will be fine.
PCPartPicker part list / Price breakdown by merchant
| Type | Item | Price |
|---|---|---|
| CPU | Intel Core i5-6600K 3.5GHz Quad-Core Processor | $238.99 @ SuperBiiz |
| CPU Cooler | Noctua NH-L9x65 33.8 CFM CPU Cooler | $49.99 @ Newegg |
| Motherboard | Gigabyte GA-Z170N-WIFI Mini ITX LGA1151 Motherboard | $134.99 @ B&H |
| Memory | Crucial Ballistix Sport LT 16GB (2 x 8GB) DDR4-2400 Memory | $68.99 @ Adorama |
| Storage | Samsung 950 PRO 256GB M.2-2280 Solid State Drive | $177.99 @ B&H |
| Case | Azza Z Mini ITX Tower Case | $75.98 @ Newegg |
| Power Supply | SeaSonic Platinum 400W 80+ Platinum Certified Fully-Modular Fanless ATX Power Supply | $99.99 @ B&H |
| Monitor | Acer G257HU smidpx 60Hz 25.0" Monitor | $259.99 @ B&H |
| Prices include shipping, taxes, rebates, and discounts | ||
| Total | $1106.91 | |
| Generated by PCPartPicker 2016-03-26 14:46 EDT-0400 |