First of all what are you planning to do in future with the case?
Few suggestions-
water cooling - 800d(14k-16k)
air cooling - haf x(15k) and silverstone rv03(10k) if you are into best air cooling and vfm
vfm - cm stryker/trooper(10-12k)
if modding is your thing

- haf 932(11k-13k)/ graphite 600t(9k to 11k) or any lian li in this budget
these are currently the best full tower/ large mid tower cabinets in india.
