the CM tcp 812 has 2 additional vapor chamber heat pipes it is better than the hyper evo 212.
as for the case the manufacture gives you these options
Front (intake) :
120 x 120 x 25 mm Turbo fan x 1 (1000rpm, 16dBA)
120 x 120 x 25 mm (optional)
Rear (exhaust) :
120 x 120 x 25 mm Blue LED fan (1000rpm,16dBA)
Top (exhaust) : (optional)
120 x 120 x 25 mm fan x 2 or 140 x 140 x 25 mm fan x 2
Bottom (Intake) : (optional)
120 x 120 x 25 mm fan
if your temps are 50-60 degrees Celsius it is running perfectly fine.
the way the manufacture tells you haw to install the fans is the best solution,because they optimize the airflow when building it.http://www.thermaltake.com/products-model_gallery.aspx?id=C_00001951
there is even a picture where shows you hot the airflow is supposed to be.