Ahh... Zebronics Bijli... small and simple yet cool lookin case.
Your current fan configs are all OK dude, but as a suggestion, for a much better air circulation
inside your case and to make the hot air inside exit more efficiently, replace the stock rear
80mm fan with one of these: http://www.coolermaster-usa.com/product.php?category_id=1654&product_id=2943,http://www.coolermaster-usa.com/product.php?category_id=1654&product_id=2883,http://www.thermaltake.com/product_info.aspx?PARENT_CID=C_00000551&id=C_00000552&name=Standard+80mm+Case+Fan&ov=n&ovid=
It will provide better exhaust performance as compared to the stock installed,
thus providing better air circulation.