Suggest Graphics Card under 10K

Sapphire HD6850 should do the trick
available around 9.8-10k
Bear in mind you need a good PSU like VX450 too if you dont have one already

^^
Already have Corsair VX 550W

go for saphire HD6850 as funky sourav its the best card u can get in ur budget

I can add 1-2k...if required

If you can stretch your budget by 1k or so then you can get Sapphirre HD 6870.Otherwise 6850 is good.

Check This

HD 6850 man what are you waiting for?

For under:
10k -- Radeon 6850
12k -- Radeon 6870
thse are the best and VFM cards under their respective budgets.

SMC are selling Saphhire 6870 for only RS 11350 i think its best deal as op has increased the budget by 2k.

Is there much performance difference ??

Check it yourself, who's the best...

Tomshardware : AMD Radeon HD 6870 And 6850: Is Barts A Step Forward? : The New Radeon HD 6000 Family

Guru3d : Radeon HD 6850 & 6870 review