with x2 980's (especially these ones) you can game at 1440p with no problems. overkill for 1080p though. for 1700 bucks, this is the most performance you'll get!
it doesn't get much better than this (below). squeezed everything together for under 1700
PCPartPicker part list / Price breakdown by merchant
CPU: Intel Core i5-6600 3.3GHz Quad-Core Processor ($216.95 @ SuperBiiz) CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.44 @ Amazon) Motherboard: MSI Z170A GAMING PRO ATX LGA1151 Motherboard ($122.98 @ Newegg) Memory: GeIL EVO POTENZA 8GB (2 x 4GB) DDR4-2133 Memory ($39.99 @ Newegg) Storage: Samsung 850 EVO-Series 120GB 2.5" Solid State Drive ($67.88 @ OutletPC) Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($46.89 @ OutletPC) Video Card: EVGA GeForce GTX 980 4GB FTW ACX 2.0 Video Card (2-Way SLI) ($520.33 @ Amazon) Video Card: EVGA GeForce GTX 980 4GB FTW ACX 2.0 Video Card (2-Way SLI) ($520.33 @ Amazon) Case: Corsair 200R ATX Mid Tower Case ($54.99 @ Micro Center) Power Supply: EVGA 750W 80+ Gold Certified Semi-Modular ATX Power Supply ($79.99 @ Amazon) Total: $1699.77 Prices include shipping, taxes, and discounts when available Generated by PCPartPicker 2016-02-01 23:13 EST-0500
edit:
you should be okay with a 750w psu, but if you can afford an 850w, i would go with that just to be safe!!!
