Don't get a 4 set of RAM. Those are aimed at LGA 2011 systems which can take advantage of quad channel memory (as opposed to dual channel on Haswell). Also, you should be fine with 8GB of RAM as of today, though if you keep the system long enough it's possible you'd want to have 16GB. 16GB would also be a good idea if you multitask and/or play MMOs where you run multiple clients at one time. 32GB is pretty much under any scenario now and will continue to be overkill on any gaming system that is built today - this amount of RAM is only useful for some video editing programs and the like, and it is extremely unlikely that games would be passing the 16GB in memory usage over the next several years. Also, I'd go with 1866 RAM as opposed to 1600.
Given your budget and how you are on the low end in that build you've posted, I see no reason why you shouldn't go for a 780 or 780 Ti (or SLI 770) right off the bat.
This is what I'd suggest:
PCPartPicker part list /
Price breakdown by merchant /
Benchmarks
CPU: Intel Core i5-4670K 3.4GHz Quad-Core Processor ($219.99 @ Newegg)
CPU Cooler: Cooler Master V6 GT 93.7 CFM CPU Cooler ($49.99 @ SuperBiiz)
Motherboard: MSI Z87-G45 Gaming ATX LGA1150 Motherboard ($145.98 @ SuperBiiz)
Memory: G.Skill Sniper Series 16GB (2 x 8GB) DDR3-1866 Memory ($161.58 @ NCIX US)
Video Card: Asus GeForce GTX 780 Ti 3GB Video Card ($704.98 @ SuperBiiz)
Case: Corsair 500R White ATX Mid Tower Case ($109.99 @ Newegg)
Power Supply: EVGA SuperNOVA 750W 80+ Gold Certified Fully-Modular ATX Power Supply ($99.99 @ Microcenter)
Total: $1492.50
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-01-27 16:08 EST-0500)