are these any good? if so which one?

[ryaaaanbaker]

I have chosen to maybe buy one of these two cases.

Does anybody know whether they are worth buying?
Do they keep the tower cool?

Cooler Master Cosmos SE Mid Tower Case

Cooler Master HAF 912 Advanced Windowed Midi Tower Case - Black

 

[Apem]

The cooling in the Cosmos SE is supposed to be terrible m8 avoid that not sure about the 912.