Do homework 1st...... what brand casing you want. Are you going
for Mod casing or just a good notmal looking casing. Do you need a
PSU (power unit).... Most branded casing doesn't come with
PSU.
Example -
My CoolerMaster elite 330 casing + Coolermaster Extreme power
600Watt PSU will cost almost $180++
Do you want to spend that much...... now i just trying to solve my
casing 'Heat' problem..... so, more $$$ for fans..... 
