NEED Help with graphic options

Should i get 1 higher end card or sli? Make sure it stays within a 1550 budget.
my current build:
[PCPartPicker part list](http://pcpartpicker.com/p/1HeGJ) / [Price breakdown by merchant](http://pcpartpicker.com/p/1HeGJ/by_merchant/) / [Benchmarks](http://pcpartpicker.com/p/1HeGJ/benchmarks/)

Type|Item|Price
:----|:----|:----
**CPU** | [Intel Core i5-4670K 3.4GHz Quad-Core Processor](http://pcpartpicker.com/part/intel-cpu-bx80646i54670k) | $199.99 @ Microcenter
**CPU Cooler** | [Phanteks PH-TC14PE_BK 78.1 CFM CPU Cooler](http://pcpartpicker.com/part/phanteks-cpu-cooler-phtc14pebk) | $74.99 @ Newegg
**Motherboard** | [Asus Maximus VI Hero ATX LGA1150 Motherboard](http://pcpartpicker.com/part/asus-motherboard-maximusvihero) | $199.99 @ Amazon
**Memory** | [Corsair Vengeance LP 8GB (2 x 4GB) DDR3-1866 Memory](http://pcpartpicker.com/part/corsair-memory-cml8gx3m2a1866c9b) | $64.99 @ Newegg
**Storage** | [Seagate 2TB 3.5" 7200RPM Hybrid Internal Hard Drive](http://pcpartpicker.com/part/seagate-internal-hard-drive-st2000dx001) | $139.99 @ Newegg
**Video Card** | [Gigabyte GeForce GTX 760 2GB Video Card](http://pcpartpicker.com/part/gigabyte-video-card-gvn760oc2gdrev20) (2-Way SLI) | $249.99 @ NCIX US
**Video Card** | [Gigabyte GeForce GTX 760 2GB Video Card](http://pcpartpicker.com/part/gigabyte-video-card-gvn760oc2gdrev20) (2-Way SLI) | $249.99 @ NCIX US
**Case** | [Fractal Design Define R4 w/Window (Black Pearl) ATX Mid Tower Case](http://pcpartpicker.com/part/fractal-design-case-fdcadefr4blw) | $89.99 @ NCIX US
**Power Supply** | [Rosewill Lightning 800W 80 PLUS Gold Certified ATX12V / EPS12V Power Supply](http://pcpartpicker.com/part/rosewill-power-supply-lightning800) | $153.98 @ Newegg
**Optical Drive** | [Lite-On iHAS124-04 DVD/CD Writer](http://pcpartpicker.com/part/lite-on-optical-drive-ihas124-04) | $14.98 @ Outlet PC
**Operating System** | [Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit)](http://pcpartpicker.com/part/microsoft-os-gfc02050) | $87.99 @ NCIX US
| | **Total**
| Prices include shipping, taxes, and discounts when available. | $1526.87
| Generated by PCPartPicker 2013-09-25 18:22 EDT-0400 |