I think Mask's Advice is very good.
If you are not looking at a complete upgrade, and most bang for buck, then a simple switch to an Opteron 165 or 175 -Depending on your budget is the best way to go.
As for availability, I doubt you will see 939 X2 any more in India, officially. But the 165 at below 11K for a brand new one seems maximum value for money. and OC that to have a rocking encoding system. The 175 should be around 14500K or lower. But i think overclocking the 165 makes more sense.