I actually meant for other HW which people generally try reusing like monitor UPS keyboard mouse, HDD, optical drive. with 15K budget I will advice try the re-use option as best as possible, reduce your cost in them and get the best proccy and board combination for yourself, because you are again going to use it for next 5 years or so. Give special consideration to PSU you buy is atleast 30-40% wattage that of your requirement, so that you can do HW addons as per your wish.
skip gfx card for now HD4200 on AMD 785 chipset is good enough for casual gaming. For board look for all solid-state capacitor board likes of gigabyte and asus.