Graphic Cards Graphics card & psu & cabinet suggestion-8k budget

[robotsmani]

Hi,

1. What is your budget?
   8k including PSU&Cabinet can extend 1k
2. Current rig Specs
   
   CPU - Core i3 3.1Ghz
   
   Motherboard - Asus P8H61-MLE
   
   RAM - 2GB
   
   Monitor - Currently i have 17" 1024x768 HCL monitor. But i have a plan in the future for 20" HD monitor
3. Which PSU/SMPS will you be using? Rating + Brand
   Normal PSU and Cabinet(I am not sure about the company and model. It is a HCL System)
4. Primary use? (Casual gaming, Hardcore gaming, Just for display, Movies/HTPC)
   Casual Gaming, Movies
5. What resolution do you game on?
   Not sure
6. Interested in Crossfire/SLI?
   No
7. Open to both Nvidia/ATI? Yes

Please suggest.
Do i need to increase the RAM?

Thanks,
Mani