As for Silencio 500 - it's a sleek stealthy looking case, slightly more spacious for large GPU's and all this with a near silent operation.
Storm Enforcer - Sexy looks. Good airflow (the internals and fan options are more like HAF 912). May use larger GPU with hard drive cage removed.
IMO go for enforcer as it is more reasonably priced.
^^buddy take a look in overclock and modding section there prabhu has bought the enforcer for 5670/- so before buying check the price.
Enforcer is a better choice considering its much more clearance clearance than sensi.
^^may be its because of demand.check with local dealer if available.and go with enforcer.