Seeing as you plan on SLI I could not reccomend either the 960 4gb or the 970. The 960 can easily fill up its vram and have power to spare... If you dont plan on OCing too terribly much I would suggest a Noctua NH-U9B SE2 for the cpu. (Unless you REALLY dont like the brown fans) AN put the spare $$ into the 4gb 960. Some people may tell you to get a 970. but what gpu are you using now? If it's something smalle than an r7 260 then the gtx960 will give a very swell improvement for 1080p gaming. Also MAy I ask what you work on? Unless you are editing video you most certainly do not need 16 gb of system RAM. 8 Would get you where you need to go and more plus you would be closer to simply going wtih a 970. Heres my list reccomendation:
PCPartPicker part list / Price breakdown by merchant
| Type | Item | Price |
|---|---|---|
| CPU | Intel Core i5-4690K 3.5GHz Quad-Core Processor | $226.99 @ SuperBiiz |
| CPU Cooler | Noctua NH-U9B SE2 37.9 CFM CPU Cooler | $44.66 @ NCIX US |
| Motherboard | Asus SABERTOOTH Z97 MARK2 ATX LGA1150 Motherboard | $159.99 @ NCIX US |
| Memory | Kingston Fury Series 8GB (2 x 4GB) DDR3-1866 Memory | $57.99 @ Amazon |
| Storage | Samsung 850 Pro Series 256GB 2.5" Solid State Drive | $139.99 @ Amazon |
| Video Card | EVGA GeForce GTX 970 4GB SSC ACX 2.0 Video Card | $315.04 @ Amazon |
| Case | Corsair 500R White ATX Mid Tower Case | $109.99 @ Newegg |
| Power Supply | Thermaltake Smart M 850W 80+ Bronze Certified Semi-Modular ATX Power Supply | $109.00 @ Amazon |
| Operating System | Microsoft Windows 8.1 Pro - 64-bit (OEM) (64-bit) | $134.89 @ OutletPC |
| Prices include shipping, taxes, rebates, and discounts | ||
| Total | $1298.54 | |
| Generated by PCPartPicker 2015-04-18 02:37 EDT-0400 |
Of course I would also reccomend a 1tb HDD from either Seagate or WEstern Digital but thats just based on how much you plan on storing on the PC. Hope I helped I'll check back every once in a while to see if you resond.