Here are some suggestions:
For the
PSU:
Corsair VX-555 550 W for Rs. 4,975 Inclusive of all Taxes (Octroi extra, where applicable)
http://www.bitfang.com/corsair-vx-555-atx-550-w-pid5566/
or
Corsair 650TX 650 W for Rs. 5,600 Inclusive of all Taxes (Octroi extra, where applicable)
http://www.bitfang.com/corsair-650tx-atx-650-w-pid920/
For the
GPU:
ASUS GTX 560 Ti DirectCU II TOP for Rs. 14,925 Inclusive of all Taxes (Octroi extra, where applicable)
http://www.bitfang.com/asus-geforce-gtx-560-ti-1-gb-video-card-pid4996/
or
MSI N560GTX-Ti Twin Frozr II for Rs. 15,600 Inclusive of all Taxes (Octroi extra, where applicable)
http://www.bitfang.com/msi-twin-frozr-ii-geforce-gtx-560-ti-1-gb-video-card-pid4964/
For the
Motherboard:
Select based on the size of the motherboard, the features you want and your budget constraints.
http://www.bitfang.com/ProductList.aspx?CID=gK68ozbYlnI%3d&SEOType=L9HgxMAMmwA%3d&SchemeType=h4umoP5x0yc%3d
For the
ATX Chassis/Case a lot of personal tastes come into play so I'll leave that up to you. Just make sure that it is able to handle the size of the motherboard and the length of the graphics card.
For
RAM:
G.Skill F3-12800CL9D-8GBXL 8GB (4GB*2) DDR3 SDRAM 1600MHz Dual Channel Kit Desktop Memory for Rs. 4,050 Inclusive of all Taxes (Octroi extra, where applicable)
http://www.bitfang.com/g-skill-f3-12800cl9d-8gbxl-8-gb-ddr3-sdram-desktop-memory-pid5944/
or
Corsair CMZ8GX3M2A1600C9 8 GB DDR3 SDRAM 1600 MHz Dual Channel Kit Desktop Memory for Rs. 4,500 Inclusive of all Taxes (Octroi extra, where applicable)
http://www.bitfang.com/corsair-cmz8gx3m2a1600c9-8-gb-ddr3-sdram-desktop-memory-pid4197/