Would SLI 660 TI's be a good idea in my Storm Enforcer?

[ss9417]

As the title states, would it be a good idea to SLI 2 660 TI's in my Cooler Master Storm Enforcer?
I heard somewhere that SLIing could be a bad idea in some cases.

Don't worry about PSU/CPU bottle necking, I have a 750w & i7 3770 respectively.

 

[slickmick15]

bump for curiosity, have this system http://www.pccasegear.com/index.php?main_page=product_info&cPath=1411&products_id=22285