With that budget, wait till the 1080 comes out. It's due to be released in the UK tomorrow and in the US either now or soon after, its a beast from what information is out there. Like it was said before, don't bother with SLI on your first build.
Threw this together to give you an idea of what to go for, with in mind of going SLI in the future and assuming you don't have an OS already and you do have a monitor.
I'm sure someone else will want to throw in their two pence.
I went for Windows 10 OS, as that'll support 64gb RAM if you want to upgrade your RAM further than 32gb. If you prefer Windows 7, then you'd have to go with the Pro versions to upgrade further than 32gb, but cost roughly the same as Win10.
[PCPartPicker part list](http://pcpartpicker.com/p/kxjG3F) / [Price breakdown by merchant](http://pcpartpicker.com/p/kxjG3F/by_merchant/)
**CPU**| [Intel Core i7-6700K 4.0GHz Quad-Core Processor](http://pcpartpicker.com/part/intel-cpu-bx80662i76700k) | $338.99 @ SuperBiiz
**CPU Cooler** | [Noctua NH-D15 82.5 CFM CPU Cooler](http://pcpartpicker.com/part/noctua-cpu-cooler-nhd15) | $84.99 @ NCIX US
**Motherboard** | [Asus MAXIMUS VIII HERO ATX LGA1151 Motherboard](http://pcpartpicker.com/part/asus-motherboard-maximusviiihero) | $202.98 @ Newegg
**Memory** | [G.Skill TridentZ Series 32GB (2 x 16GB) DDR4-3333 Memory](http://pcpartpicker.com/part/gskill-memory-f43333c16d32gtz) | $199.99 @ Newegg
**Storage** | [Samsung 850 EVO-Series 500GB 2.5" Solid State Drive](http://pcpartpicker.com/part/samsung-internal-hard-drive-mz75e500bam) | $149.99 @ Amazon
**Storage** | [Seagate Barracuda 3TB 3.5" 7200RPM Internal Hard Drive](http://pcpartpicker.com/part/seagate-internal-hard-drive-stbd3000100) | $99.99 @ Best Buy
**Case** | [Cooler Master Storm Stryker (White) ATX Full Tower Case](http://pcpartpicker.com/part/cooler-master-case-sgc5000wkwn1) | $139.99 @ Newegg
**Power Supply** | [Corsair 1200W 80+ Platinum Certified Fully-Modular ATX Power Supply](http://pcpartpicker.com/part/corsair-power-supply-ax1200i) | $307.99 @ Amazon
**Operating System** | [Microsoft Windows 10 Pro Full (32/64-bit)](http://pcpartpicker.com/part/microsoft-os-fqc09131) | $199.99 @ B&H
| *Prices include shipping, taxes, rebates, and discounts* |
| Total (before mail-in rebates) | $1864.89
| Mail-in rebates | -$25.00
| **Total** | **$1839.89**
The price for a GTX 1080 will be roughly around $600-650 over in the US, from what I've read, so this will take you roughly to $2400