Your pc is fully compaitable with any gpu.here my suggestions 1)avoid wd 'green' series hd instead get wd cavier blue hard drive. 2)you doesnot need cabinet of rs 5000 instead get corsair 300r or get in range of rs 3000 as you can save money to get gpu. 3) get corsair cx 500w from local store at rs 3500 as flipkart is overpriced.
corsair 300r is 5719.i stay in mangalore here the stores prices are almost same as flipkart.
btw are the parts which i listed compatible with each other?