GPU Suggestions ($200 - $250)

I am looking to add a GPU to my custom build. My price range is around $200 - $250. I prefer NVIDIA. What would you all suggest with in my budget? Also, if you have a ~$300 option I would be interested in hearing that too.

I am planning on playing Far Cry 3 and GTA 5 when it comes out later this year.

I am hoping for an SLI solution, so I can double up on it once my budget allows.

My Build:
Case: Corsair Carbide Series Black 400R
Motherboard: Gigabyte Z77X-UD5H
Processor: Intel Core i7 3770K
Memory: Corsair Vengeance LP 16GB (2 x 8GB)
Windows SSD: Crucial m4 256GB
Ubuntu SSD: OCZ 128GB Vertex 4 Series
Data HHD: Western Digital 1TB Black
Heat Sync: Cool Master 212 Evo
Power: Corsair CX600 (Considering Upgrade to CX750 if needed)
Disk Drive: LG Blu-ray

Thanks!