$2k is plenty for a killer build
http://pcpartpicker.com/p/dggwLk
New GPU's are rumored to be out by middle of next year.
Thus I would suggest a similar build but go for a holdover GPU and keep your current monitor for now.
Perhaps like this:
http://pcpartpicker.com/p/MyD2vK
CPU: Intel Core i7-4790K 4.0GHz Quad-Core Processor ($309.99 @ SuperBiiz)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($19.89 @ OutletPC)
Motherboard: ASRock Z97 EXTREME6 ATX LGA1150 Motherboard ($122.98 @ Newegg)
Memory: G.Skill Ares Series 16GB (2 x 8GB) DDR3-1866 Memory CAS 10 1.5v ($64.99 @ Newegg)
Storage: Samsung 850 EVO-Series 500GB 2.5" Solid State Drive ($147.99 @ Newegg) *COMBO
Video Card: Sapphire Radeon R9 290 4GB Video Card ($213.98 @ Newegg)
Power Supply: Thermaltake TR2 700W 80+ Gold Certified ATX Power Supply ($49.99 @ Newegg) *COMBO
Operating System: Microsoft Windows 10 Home OEM (64-bit) ($89.88 @ OutletPC)
Total: $1002.69
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-12-09 01:08 EST-0500
That's almost exactly half the budget. In 6-8 months sell off the cheap video card to recover ~100$ and then use the remaining $1.1k to buy a nice monitor and GPU.
Because of the new manufacturing node I fully expect a large performance jump in the $500+ high end GPU categories (30% or more). Add in the newer memory and display technologies along with efficiency improvements etc I think it'll be worthwhile to wait.
Edit: And the 290 isn't a bad performer either, along with your current 1920x1200 monitor you'll still be enjoying great performance in games until the big update happens.