If you have proper case airflow, it doesn't matter about the cooler. The stock cooler doesn't exhaust the air out either. People blow this way out of proportion on the X1 and X2 coolers.
If this cooler causes temp problems for you, it was time to rework your case cooling anyway.
“What the hell did you expect? Leave Vista under the pillow and the OS fairy would make it Win7?” -El Fiendo
“And Bring Mailman back god damnit, he is the Eric Cartman of TPU” -MRCL