Changing Font Options in CKEditor
Solution:
It took me quite a while to figure this out. 
Let us say you want to use Verdana as the default font. Here is what you can do:


Open contents.css and change the font tag:

font-family: Verdana;
In the application/page where the output will be published, add this style:


.entry-content {font-family: Tahoma;}



That's it! Now you have change the default font successfully. This works for the font size as well. I just finished developing this question2answer site, http://banatbanat.com, which utilizes CKEditor and this tiny issue kept me awake for two days!