Hey, considering the games you intend to play, trust me, there is no fun in playing them at low or medium settings. The prices of cards have shot up violently in India, especially of flipkart! Try to increase your budget to 8000 or 9000 and buy a decent card so that you can actually enjoy playing the games you mentioned.
Ex: Nvidia gtx 650. Its pretty decent for your needs and low on power consumption.