Hey Man,
IMHO, a coolerdor is very much superior, to the display humidor. It also blocks UV rays which can be harmful, even in difused light. If you want a coolerdor to "breath", open it every couple of days. I can't stay out of mine, much longer than that. Not to mention, a coolerdor also minimizes temperature fluctuations, much better.
Just my .02
Later
Dave (A.K.A. Homebrew)