I don't like the idea of popup browser windows when using TinyMCE. Everywhere there's a popup, there's and ugly browser window, displaying the url that your members have no business seeing. I find this very annoying. Fortunately, there is an easy fix.
Just add 'inlinepopups' to the list of plugins, in all the different editors initialized in BxBaseConfig.php Then instead of TinyMCE using those ugly browser windows, you'll have a nice clean floating div that pops up. Also, popup blockers are no longer a concern. Watch the attached video for a demo of how this looks.