I currently have a 493AH and I am going to a 2011UiAS. Can I just export the configuration file and then put it into the new router when it gets here and be back up and running? Or will there be some configuration issues I will need to address?

You'll want to make sure they are the same ROS version, or at least, as close as possible so that you do not have problems with the syntax. When I copy the export from one router to another, I look for any MAC addresses and remove them. Then I copy and paste it over in sections, to make it easier to tell if one section had errors.