^^ NZXT Gamma ~ 2100/- if possible other option Cooler Master eLite 430 ~ 2500/-, fitting a mid-tower in this budget is impossible, extend your budget ~ 4000/- OR hold on your expansion plans for the time-being.
Get the NZXT Gamma as a priority and add two fans (Cooler Master R4's) and you'll have a great setup ~ 3000/-, best airflow and cable management in given budget, better than any Cooler Master eLite crap. But I've heard in Delhi getting NZXT is hard.
^^ Dude I've seen your other thread @PC Buying advice my call would be save up some more cash, rather than taking a compromise system. Just my thought because now I regret spending extra on my key-board (Razer Lycosa) instead of buying the ATi HD 5850 now my HD 5770 is having issues running games @1600x 900.
Nzxt gama does not have a side transparent window but is the best in ur budget . If you insist on side window then you can get cooler master elite 310 , i am using one and is OK , if you add extra fans.
better post a wtb thread in market zone. who knows, maybe you can get a better one in 2k range from someone living near your place.... cabby has no moving parts so it doesn't go bad..